Any planet has an extremely faint light source compared to its parent star. In addition to the intrinsic difficulty of detecting such a faint light source, the light from the parent star causes a glare that washes it out. For those reasons, very few of the extrasolar planets reported as of April 2014, have been observed directly, with even fewer being resolved from their host star.
Instead, astronomers have generally had to resort to indirect methods to detect extrasolar planets. At the present time, several different indirect methods have yielded success.
Established detection methods
The following methods have proved successful for discovering a new planet or detecting already discovered planet at least once:
Radial velocity
A star with a planet will move in its own small orbit in response to the planet's gravity. This leads to variations in the speed with which the star moves toward or away from Earth, i.e. the variations are in the radial velocity of the star with respect to Earth. The radial velocity can be deduced from the displacement in the parent star's spectral lines due to the Doppler effect. The radial-velocity method measures these variations in order to confirm the presence of the planet.
An exoplanet or extrasolar planet is a planet that orbits a star other than the Sun. Over 2000 exoplanets have been discovered since 1988 (2073 planets in 1321planetary systems including 507multiple planetary systems as of 10 February 2016).
The Kepler space telescope has also detected a few thousand candidate planets, of which about 11% may be false positives.
There is at least one planet on average per star.
About 1 in 5 Sun-like stars have an "Earth-sized" planet in the habitable zone, with the nearest expected to be within 12 light-years distance from Earth. Assuming 200 billion stars in the Milky Way, that would be 11 billion potentially habitable Earth-sized planets in the Milky Way, rising to 40 billion if planets orbiting the numerous red dwarfs are included.
The least massive planet known is PSR B1257+12 A, which is about twice the mass of the Moon. The most massive planet listed on the NASA Exoplanet Archive is DENIS-P J082303.1-491201 b, about 29 times the mass of Jupiter, although according to most definitions of a planet, it is too massive to be a planet and may be a brown dwarf instead. There are planets that are so near to their star that they take only a few hours to orbit and there are others so far away that they take thousands of years to orbit. Some are so far out that it is difficult to tell whether they are gravitationally bound to the star. Almost all of the planets detected so far are within the Milky Way, but there have also been a few possible detections of extragalactic planets.
Take an Epic Journey to Kepler-452B, the Most Earth-Like Exoplanet Discovered So Far!
Come with me on an epic journey through time and space, from Earth to one of the most Earth-like exoplanets potentially ever discovered. In this experience, you will fly faster than the speed of light out of the solar system, through interstellar space to Kepler-452b, possibly an Earth 2.0. What wonders will we discover at this mysterious exoplanet? Let's find out!
This incredible animation was created using Space Engine Pro.
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published: 25 Jul 2024
What Is an Exoplanet?
Exoplanets – planets outside our solar system – are everywhere. But why do we study them? What makes them so interesting? At NASA, we're surveying and studying exoplanets to learn all about their weirdness, their variety, and all the fascinating things they can tell us about how planets form and develop.
Credit: NASA/JPL-Caltech
published: 05 Apr 2021
Exoplanets 101 | National Geographic
Exoplanets challenge the notion that we are alone in the universe. Learn what types of exoplanets exist, the methods scientists employ to find them, and how many worlds might exist in the Milky Way Galaxy.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
#NationalGeographic #Exoplanets #Educational
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
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Read more in "Exoplanet...
published: 07 Mar 2019
Is KEPLER-452b exoplanet really habitable?
Kepler-452b has a probable mass 1.5 times that of Earth, and its surface gravity is nearly twice as much as Earth's, though calculations of mass for exoplanets are only rough estimates. If it is a terrestrial planet, it is most likely a super-Earth with many active volcanoes due to its higher mass and density.
Universe space planets stars galaxy
published: 01 Jun 2023
There are no known habitable exoplanets
Everywhere you look, there are people claiming NASA found "Earth 2.0" or "planets better for life than Earth". But this isn't true. Kepler-22 b, Kepler-186 f, Gliese 667 Cc, Proxima Centauri b, the TRAPPIST-1 system, K2-18 b, and all other potentially habitable exoplanets likely can't host alien life. Even with things like the James Webb Space Telescope, we have yet to find any habitable exoplanets.
If you enjoy, please like and subscribe
Footage in this video taken using Space Engine
published: 25 May 2024
New Exoplanet Discoveries - Could They Be Better than Earth? | What If
Recap some of our most-watched exoplanet scenarios.
Get our 100 best episodes in one mind-blowing book: http://bit.ly/ytc-the-what-if-100-book
In this video, we're looking into some of the latest exoplanet discoveries and their potential implications for astrobiology. Could they be better than Earth? These discoveries could change the way we think about the universe and our place in it.
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What If is a mini-documen...
published: 11 May 2023
Scientists Discovered an Exoplanet That Could Host Alien Life
One hundred twenty light-years from us, there is an exoplanet that can potentially host life. It's called K2-18b, and it's the world you'd want to visit. K2-18b isn't exactly like Earth. It's more like a Super-Earth. Yeah, it's 2.6 times larger and almost nine times more massive than our planet.
Transcript and sources: https://whatifshow.com/scientists-discovered-a-strange-exoplanet-that-could-host-life/
Made possible with the support of Ontario Creates: https://ontariocreates.ca
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published: 21 Oct 2023
J1407b exoplanet has the largest known ring system. #space #astronomy #science #cosmoknowledge
published: 12 Feb 2023
We Found Life on an Exoplanet K218B #space #universe #astronomy #cosmos #exoplanets
published: 09 Nov 2024
James Webb Space Telescope Finds New Planets! Could They Harbor Life?
James Webb Space Telescope Finds New Planets! Could They Harbor Life?
► Subscribe: https://goo.gl/r5jd1F
Thanks to the James Webb Space Telescope, a discovery that seemed ordinary at first is now turning into something extraordinary. Meet LHS 1140b, a super-Earth in the constellation Cetus that just might be our next best hope for finding life beyond Earth!
Astronomers at the Université of Montréal are super excited about this planet they discovered a while back. At first, it seemed like just another barren exoplanet - nothing really interesting. But now new information from the James Webb Space Telescope shows that the planet is way more interesting than originally thought. It’s a super-Earth that might be able to support life.
Come with me on an epic journey through time and space, from Earth to one of the most Earth-like exoplanets potentially ever discovered. In this experience, you...
Come with me on an epic journey through time and space, from Earth to one of the most Earth-like exoplanets potentially ever discovered. In this experience, you will fly faster than the speed of light out of the solar system, through interstellar space to Kepler-452b, possibly an Earth 2.0. What wonders will we discover at this mysterious exoplanet? Let's find out!
This incredible animation was created using Space Engine Pro.
Want to help me make more videos? Buy me a coffee here -
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Come with me on an epic journey through time and space, from Earth to one of the most Earth-like exoplanets potentially ever discovered. In this experience, you will fly faster than the speed of light out of the solar system, through interstellar space to Kepler-452b, possibly an Earth 2.0. What wonders will we discover at this mysterious exoplanet? Let's find out!
This incredible animation was created using Space Engine Pro.
Want to help me make more videos? Buy me a coffee here -
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Exoplanets – planets outside our solar system – are everywhere. But why do we study them? What makes them so interesting? At NASA, we're surveying and studying ...
Exoplanets – planets outside our solar system – are everywhere. But why do we study them? What makes them so interesting? At NASA, we're surveying and studying exoplanets to learn all about their weirdness, their variety, and all the fascinating things they can tell us about how planets form and develop.
Credit: NASA/JPL-Caltech
Exoplanets – planets outside our solar system – are everywhere. But why do we study them? What makes them so interesting? At NASA, we're surveying and studying exoplanets to learn all about their weirdness, their variety, and all the fascinating things they can tell us about how planets form and develop.
Credit: NASA/JPL-Caltech
Exoplanets challenge the notion that we are alone in the universe. Learn what types of exoplanets exist, the methods scientists employ to find them, and how man...
Exoplanets challenge the notion that we are alone in the universe. Learn what types of exoplanets exist, the methods scientists employ to find them, and how many worlds might exist in the Milky Way Galaxy.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
#NationalGeographic #Exoplanets #Educational
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
Get More National Geographic:
Official Site: http://bit.ly/NatGeoOfficialSite
Facebook: http://bit.ly/FBNatGeo
Twitter: http://bit.ly/NatGeoTwitter
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Read more in "Exoplanets: Alien Worlds"
https://on.natgeo.com/2uAn0LH
Exoplanets 101 | National Geographic
https://youtu.be/EUU0-ZpFoK4
National Geographic
https://www.youtube.com/natgeo
Exoplanets challenge the notion that we are alone in the universe. Learn what types of exoplanets exist, the methods scientists employ to find them, and how many worlds might exist in the Milky Way Galaxy.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
#NationalGeographic #Exoplanets #Educational
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
Get More National Geographic:
Official Site: http://bit.ly/NatGeoOfficialSite
Facebook: http://bit.ly/FBNatGeo
Twitter: http://bit.ly/NatGeoTwitter
Instagram: http://bit.ly/NatGeoInsta
Read more in "Exoplanets: Alien Worlds"
https://on.natgeo.com/2uAn0LH
Exoplanets 101 | National Geographic
https://youtu.be/EUU0-ZpFoK4
National Geographic
https://www.youtube.com/natgeo
Kepler-452b has a probable mass 1.5 times that of Earth, and its surface gravity is nearly twice as much as Earth's, though calculations of mass for exoplanets ...
Kepler-452b has a probable mass 1.5 times that of Earth, and its surface gravity is nearly twice as much as Earth's, though calculations of mass for exoplanets are only rough estimates. If it is a terrestrial planet, it is most likely a super-Earth with many active volcanoes due to its higher mass and density.
Universe space planets stars galaxy
Kepler-452b has a probable mass 1.5 times that of Earth, and its surface gravity is nearly twice as much as Earth's, though calculations of mass for exoplanets are only rough estimates. If it is a terrestrial planet, it is most likely a super-Earth with many active volcanoes due to its higher mass and density.
Universe space planets stars galaxy
Everywhere you look, there are people claiming NASA found "Earth 2.0" or "planets better for life than Earth". But this isn't true. Kepler-22 b, Kepler-186 f, G...
Everywhere you look, there are people claiming NASA found "Earth 2.0" or "planets better for life than Earth". But this isn't true. Kepler-22 b, Kepler-186 f, Gliese 667 Cc, Proxima Centauri b, the TRAPPIST-1 system, K2-18 b, and all other potentially habitable exoplanets likely can't host alien life. Even with things like the James Webb Space Telescope, we have yet to find any habitable exoplanets.
If you enjoy, please like and subscribe
Footage in this video taken using Space Engine
Everywhere you look, there are people claiming NASA found "Earth 2.0" or "planets better for life than Earth". But this isn't true. Kepler-22 b, Kepler-186 f, Gliese 667 Cc, Proxima Centauri b, the TRAPPIST-1 system, K2-18 b, and all other potentially habitable exoplanets likely can't host alien life. Even with things like the James Webb Space Telescope, we have yet to find any habitable exoplanets.
If you enjoy, please like and subscribe
Footage in this video taken using Space Engine
Recap some of our most-watched exoplanet scenarios.
Get our 100 best episodes in one mind-blowing book: http://bit.ly/ytc-the-what-if-100-book
In this video, ...
Recap some of our most-watched exoplanet scenarios.
Get our 100 best episodes in one mind-blowing book: http://bit.ly/ytc-the-what-if-100-book
In this video, we're looking into some of the latest exoplanet discoveries and their potential implications for astrobiology. Could they be better than Earth? These discoveries could change the way we think about the universe and our place in it.
T-shirts and merch: https://bit.ly/shopwhatif
What If elsewhere:
Instagram: http://bit.ly/whatif-instagram
Discord: https://discord.gg/Bj5UnspbwE
Twitter: http://bit.ly/whatif-twitter
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What If in Mandarin: http://bit.ly/YT-Chinese-what-if
Podcast: http://bit.ly/yt-what-if-show-podcast
What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.
Produced with love by Underknown in Toronto: https://underknown.com
Contact us at https://underknown.com/contact/
#whatif #cosmos #space
Recap some of our most-watched exoplanet scenarios.
Get our 100 best episodes in one mind-blowing book: http://bit.ly/ytc-the-what-if-100-book
In this video, we're looking into some of the latest exoplanet discoveries and their potential implications for astrobiology. Could they be better than Earth? These discoveries could change the way we think about the universe and our place in it.
T-shirts and merch: https://bit.ly/shopwhatif
What If elsewhere:
Instagram: http://bit.ly/whatif-instagram
Discord: https://discord.gg/Bj5UnspbwE
Twitter: http://bit.ly/whatif-twitter
Facebook: http://bit.ly/facebook-whatif
What If in Spanish: http://bit.ly/YT-Spanish-what-if
What If in Mandarin: http://bit.ly/YT-Chinese-what-if
Podcast: http://bit.ly/yt-what-if-show-podcast
What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.
Produced with love by Underknown in Toronto: https://underknown.com
Contact us at https://underknown.com/contact/
#whatif #cosmos #space
One hundred twenty light-years from us, there is an exoplanet that can potentially host life. It's called K2-18b, and it's the world you'd want to visit. K2-18b...
One hundred twenty light-years from us, there is an exoplanet that can potentially host life. It's called K2-18b, and it's the world you'd want to visit. K2-18b isn't exactly like Earth. It's more like a Super-Earth. Yeah, it's 2.6 times larger and almost nine times more massive than our planet.
Transcript and sources: https://whatifshow.com/scientists-discovered-a-strange-exoplanet-that-could-host-life/
Made possible with the support of Ontario Creates: https://ontariocreates.ca
Get the What if book: http://bit.ly/ytc-the-what-if-100-book
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Produced with love by Underknown in Toronto: https://underknown.com
#whatif #exoplanets #newearth #K218b #space #science
One hundred twenty light-years from us, there is an exoplanet that can potentially host life. It's called K2-18b, and it's the world you'd want to visit. K2-18b isn't exactly like Earth. It's more like a Super-Earth. Yeah, it's 2.6 times larger and almost nine times more massive than our planet.
Transcript and sources: https://whatifshow.com/scientists-discovered-a-strange-exoplanet-that-could-host-life/
Made possible with the support of Ontario Creates: https://ontariocreates.ca
Get the What if book: http://bit.ly/ytc-the-what-if-100-book
Join this channel to get access to perks:
https://www.youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join
Interested in sponsoring our episodes or collaborating? Email us: [email protected]
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#whatif #exoplanets #newearth #K218b #space #science
James Webb Space Telescope Finds New Planets! Could They Harbor Life?
► Subscribe: https://goo.gl/r5jd1F
Thanks to the James Webb Space Telescope, a discovery ...
James Webb Space Telescope Finds New Planets! Could They Harbor Life?
► Subscribe: https://goo.gl/r5jd1F
Thanks to the James Webb Space Telescope, a discovery that seemed ordinary at first is now turning into something extraordinary. Meet LHS 1140b, a super-Earth in the constellation Cetus that just might be our next best hope for finding life beyond Earth!
Astronomers at the Université of Montréal are super excited about this planet they discovered a while back. At first, it seemed like just another barren exoplanet - nothing really interesting. But now new information from the James Webb Space Telescope shows that the planet is way more interesting than originally thought. It’s a super-Earth that might be able to support life.
James Webb Space Telescope Finds New Planets! Could They Harbor Life?
► Subscribe: https://goo.gl/r5jd1F
Thanks to the James Webb Space Telescope, a discovery that seemed ordinary at first is now turning into something extraordinary. Meet LHS 1140b, a super-Earth in the constellation Cetus that just might be our next best hope for finding life beyond Earth!
Astronomers at the Université of Montréal are super excited about this planet they discovered a while back. At first, it seemed like just another barren exoplanet - nothing really interesting. But now new information from the James Webb Space Telescope shows that the planet is way more interesting than originally thought. It’s a super-Earth that might be able to support life.
Come with me on an epic journey through time and space, from Earth to one of the most Earth-like exoplanets potentially ever discovered. In this experience, you will fly faster than the speed of light out of the solar system, through interstellar space to Kepler-452b, possibly an Earth 2.0. What wonders will we discover at this mysterious exoplanet? Let's find out!
This incredible animation was created using Space Engine Pro.
Want to help me make more videos? Buy me a coffee here -
https://buymeacoffee.com/v101space
Or join the community and become a V101 member or Patron Today -
https://www.youtube.com/channel/UC_MTPqgFSm_8WUWaCHIfUgQ/join
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Exoplanets – planets outside our solar system – are everywhere. But why do we study them? What makes them so interesting? At NASA, we're surveying and studying exoplanets to learn all about their weirdness, their variety, and all the fascinating things they can tell us about how planets form and develop.
Credit: NASA/JPL-Caltech
Exoplanets challenge the notion that we are alone in the universe. Learn what types of exoplanets exist, the methods scientists employ to find them, and how many worlds might exist in the Milky Way Galaxy.
➡ Subscribe: http://bit.ly/NatGeoSubscribe
#NationalGeographic #Exoplanets #Educational
About National Geographic:
National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
Get More National Geographic:
Official Site: http://bit.ly/NatGeoOfficialSite
Facebook: http://bit.ly/FBNatGeo
Twitter: http://bit.ly/NatGeoTwitter
Instagram: http://bit.ly/NatGeoInsta
Read more in "Exoplanets: Alien Worlds"
https://on.natgeo.com/2uAn0LH
Exoplanets 101 | National Geographic
https://youtu.be/EUU0-ZpFoK4
National Geographic
https://www.youtube.com/natgeo
Kepler-452b has a probable mass 1.5 times that of Earth, and its surface gravity is nearly twice as much as Earth's, though calculations of mass for exoplanets are only rough estimates. If it is a terrestrial planet, it is most likely a super-Earth with many active volcanoes due to its higher mass and density.
Universe space planets stars galaxy
Everywhere you look, there are people claiming NASA found "Earth 2.0" or "planets better for life than Earth". But this isn't true. Kepler-22 b, Kepler-186 f, Gliese 667 Cc, Proxima Centauri b, the TRAPPIST-1 system, K2-18 b, and all other potentially habitable exoplanets likely can't host alien life. Even with things like the James Webb Space Telescope, we have yet to find any habitable exoplanets.
If you enjoy, please like and subscribe
Footage in this video taken using Space Engine
Recap some of our most-watched exoplanet scenarios.
Get our 100 best episodes in one mind-blowing book: http://bit.ly/ytc-the-what-if-100-book
In this video, we're looking into some of the latest exoplanet discoveries and their potential implications for astrobiology. Could they be better than Earth? These discoveries could change the way we think about the universe and our place in it.
T-shirts and merch: https://bit.ly/shopwhatif
What If elsewhere:
Instagram: http://bit.ly/whatif-instagram
Discord: https://discord.gg/Bj5UnspbwE
Twitter: http://bit.ly/whatif-twitter
Facebook: http://bit.ly/facebook-whatif
What If in Spanish: http://bit.ly/YT-Spanish-what-if
What If in Mandarin: http://bit.ly/YT-Chinese-what-if
Podcast: http://bit.ly/yt-what-if-show-podcast
What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.
Produced with love by Underknown in Toronto: https://underknown.com
Contact us at https://underknown.com/contact/
#whatif #cosmos #space
One hundred twenty light-years from us, there is an exoplanet that can potentially host life. It's called K2-18b, and it's the world you'd want to visit. K2-18b isn't exactly like Earth. It's more like a Super-Earth. Yeah, it's 2.6 times larger and almost nine times more massive than our planet.
Transcript and sources: https://whatifshow.com/scientists-discovered-a-strange-exoplanet-that-could-host-life/
Made possible with the support of Ontario Creates: https://ontariocreates.ca
Get the What if book: http://bit.ly/ytc-the-what-if-100-book
Join this channel to get access to perks:
https://www.youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join
Interested in sponsoring our episodes or collaborating? Email us: [email protected]
Our other channels:
How to Survive: https://bit.ly/how-to-survive-show
Aperture: https://bit.ly/aperture-show
T-shirts and merch: https://bit.ly/shopwhatif
Newsletter: http://bit.ly/whatif-newsletter
What If elsewhere:
Discord: https://discord.gg/Bj5UnspbwE
Whatsapp: https://whatsapp.com/channel/0029Va8VC502ER6r1yk1yP2Y
Instagram: http://bit.ly/whatif-instagram
Twitter: http://bit.ly/whatif-twitter
Facebook: http://bit.ly/facebook-whatif
Produced with love by Underknown in Toronto: https://underknown.com
#whatif #exoplanets #newearth #K218b #space #science
James Webb Space Telescope Finds New Planets! Could They Harbor Life?
► Subscribe: https://goo.gl/r5jd1F
Thanks to the James Webb Space Telescope, a discovery that seemed ordinary at first is now turning into something extraordinary. Meet LHS 1140b, a super-Earth in the constellation Cetus that just might be our next best hope for finding life beyond Earth!
Astronomers at the Université of Montréal are super excited about this planet they discovered a while back. At first, it seemed like just another barren exoplanet - nothing really interesting. But now new information from the James Webb Space Telescope shows that the planet is way more interesting than originally thought. It’s a super-Earth that might be able to support life.
Any planet has an extremely faint light source compared to its parent star. In addition to the intrinsic difficulty of detecting such a faint light source, the light from the parent star causes a glare that washes it out. For those reasons, very few of the extrasolar planets reported as of April 2014, have been observed directly, with even fewer being resolved from their host star.
Instead, astronomers have generally had to resort to indirect methods to detect extrasolar planets. At the present time, several different indirect methods have yielded success.
Established detection methods
The following methods have proved successful for discovering a new planet or detecting already discovered planet at least once:
Radial velocity
A star with a planet will move in its own small orbit in response to the planet's gravity. This leads to variations in the speed with which the star moves toward or away from Earth, i.e. the variations are in the radial velocity of the star with respect to Earth. The radial velocity can be deduced from the displacement in the parent star's spectral lines due to the Doppler effect. The radial-velocity method measures these variations in order to confirm the presence of the planet.
Five years since the Kepler Space Telescope was retired, a team of astronomers believe they’ve found exoplanets captured by some of the veteran observatory’s last light. Read more... .