In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
This can happen either because the pair forms a binary star, i.e. a binary system of stars in mutual orbit, gravitationally bound to each other, or because it is an optical double, a chance alignment of two stars in the sky that lie at different distances. Binary stars are important to stellar astronomers as knowledge of their motions allows direct calculation of stellar mass and other stellar parameters.
Since the beginning of the 1780s, both professional and amateur double star observers have telescopically measured the distances and angles between double stars to determine the relative motions of the pairs. If the relative motion of a pair determines a curved arc of an orbit, or if the relative motion is small compared to the common proper motion of both stars, it may be concluded that the pair is in mutual orbit as a binary star. Otherwise, the pair is optical.Multiple stars are also studied in this way, although the dynamics of multiple stellar systems are more complex than those of binary stars.
How to make a rubber band star, double stars, and triple stars with 1 rubber band trick.
How to make a rubber band star, double stars, triple stars with one rubber band by uncle diy youtube video. This easy 1 rubber band tricks show step by step how to make 1 star to 2 stars to 3stars.
Music: Maipen Lei
Site: https://icons8.com/music/
published: 22 Nov 2019
How to make a Double stars with 1 rubber band. rubber bands trick. 双星橡皮筋制作方法童年回忆玩意。
Uncle diy youtube video of how to make a double star origami rubber band with 1 rubber band for kids. Easy Step by step diy simple trick just by using 1 rubber band to form this origami double stars. This is a popular old games that bring a lot of fun memory. 双星橡皮筋制作方法童年回忆玩意。
published: 21 Oct 2019
How to Make A Double Stars with A Rubber Band
How to Make A Double Stars with A Rubber Band
published: 14 Oct 2016
Napkin Fold Double Star Tutorial
A simple step-by-step tutorial on how to fold a napkin into a double star. Add some elegance to your wedding, holiday, party, or event with fancy napkin origami. It works great with a cloth napkin or paper napkin.
I am using a 17 inch cloth napkin, but you can use a paper napkin, handkerchief / hanky, or a napkin of any size as long as it’s a square.
Napkin Folding Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL-4ezdEpGyqKV3B1Zb6qkdn
Napkin Silverware Pocket Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9TLJzcD-wu8wO_czuk7J2w
Traditional Origami Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9dkIgRm2U5pNSeDK4oXhEA
🔷 My favorite 6 inch origami paper: https://amzn.to/3h0veDn
🔷 10 inch kami: https://amzn.to/3jPWDJg
🔷 ...
published: 12 Apr 2020
Binary and Multiple Stars: Crash Course Astronomy #34
Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually touch other, merging into one peanut-shaped star. In some close binaries, matter can flow from one star to the other, changing the way it ages. If one star is a white dwarf, this can cause periodic explosions, and possibly even lead to blowing up the entire star.
Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster
--
Chapters:
Introduction: Binary & Multiple Stars 00:00
Visual Binary Stars 1:45
Spectroscopic Binaries 3:05
Multiple Star Systems 4:15
Eclipsing Binaries...
published: 01 Oct 2015
Binary Star Systems
A brief look at binary star systems. Enjoy!
If you like this sort of video, please leave a thumbs up.
Program:
Space Engine
http://en.spaceengine.org/
Music:
Space Music - Nova
https://www.youtube.com/watch?v=1AEujqXRJco
published: 21 Aug 2016
How to make a Double Ninja Star - Origami
How to make a Paper Ninja Star - Origami.
How to make a Double Ninja Star.
Easy Origami Tutorial.
Thank You For Watching.
SUBSCRIBE for more awesome tutorials.
Intro Music : Dub Zap (Downloaded From the YouTube Audio Library)
Background Music:
Get_Back_Up
(Downloaded from the YouTube Audio Library)
Outro Music: Jim Yosef & Alex Skrindo - Passion [NCS Release]
Learn : How to make a Paper Ninja Star.
How to make a Paper Double Ninja Star - Origami.
TheCrazyTutorials
published: 07 Jun 2018
How to make a rubber-band double star with 1 rubber band and 2 rubber bands tricks.
Uncle diy youtube video of rubberband double star with 1 rubber band and 2 rubber bands technique. This is the simple easy way to make a double stars band.
Music: Mangoe
Musician: Jeff Kaale
published: 22 Aug 2020
Double Star Drop - Aerial Silk Tutorial - with Aerial Physique
👉 For more step-by-step tutorials, visit www.aerialphysique.tv.
published: 29 Apr 2016
How to create Rubber-band origami alphabet A tutorial double star rubber band 橡皮筋A英文字母
How to make a Rubberband alphabet A with 1 Rubberband. This is a tutorial video from Uncle DIY newly create way to make this Rubberband A.
橡皮筋教学: A 英文字 橡皮筋
Background music: free copyright music
How to make a rubber band star, double stars, triple stars with one rubber band by uncle diy youtube video. This easy 1 rubber band tricks show step by step how...
How to make a rubber band star, double stars, triple stars with one rubber band by uncle diy youtube video. This easy 1 rubber band tricks show step by step how to make 1 star to 2 stars to 3stars.
Music: Maipen Lei
Site: https://icons8.com/music/
How to make a rubber band star, double stars, triple stars with one rubber band by uncle diy youtube video. This easy 1 rubber band tricks show step by step how to make 1 star to 2 stars to 3stars.
Music: Maipen Lei
Site: https://icons8.com/music/
Uncle diy youtube video of how to make a double star origami rubber band with 1 rubber band for kids. Easy Step by step diy simple trick just by using 1 rubber...
Uncle diy youtube video of how to make a double star origami rubber band with 1 rubber band for kids. Easy Step by step diy simple trick just by using 1 rubber band to form this origami double stars. This is a popular old games that bring a lot of fun memory. 双星橡皮筋制作方法童年回忆玩意。
Uncle diy youtube video of how to make a double star origami rubber band with 1 rubber band for kids. Easy Step by step diy simple trick just by using 1 rubber band to form this origami double stars. This is a popular old games that bring a lot of fun memory. 双星橡皮筋制作方法童年回忆玩意。
A simple step-by-step tutorial on how to fold a napkin into a double star. Add some elegance to your wedding, holiday, party, or event with fancy napkin origami...
A simple step-by-step tutorial on how to fold a napkin into a double star. Add some elegance to your wedding, holiday, party, or event with fancy napkin origami. It works great with a cloth napkin or paper napkin.
I am using a 17 inch cloth napkin, but you can use a paper napkin, handkerchief / hanky, or a napkin of any size as long as it’s a square.
Napkin Folding Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL-4ezdEpGyqKV3B1Zb6qkdn
Napkin Silverware Pocket Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9TLJzcD-wu8wO_czuk7J2w
Traditional Origami Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9dkIgRm2U5pNSeDK4oXhEA
🔷 My favorite 6 inch origami paper: https://amzn.to/3h0veDn
🔷 10 inch kami: https://amzn.to/3jPWDJg
🔷 14 inch kami: https://amzn.to/3b39Aw0
A simple step-by-step tutorial on how to fold a napkin into a double star. Add some elegance to your wedding, holiday, party, or event with fancy napkin origami. It works great with a cloth napkin or paper napkin.
I am using a 17 inch cloth napkin, but you can use a paper napkin, handkerchief / hanky, or a napkin of any size as long as it’s a square.
Napkin Folding Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL-4ezdEpGyqKV3B1Zb6qkdn
Napkin Silverware Pocket Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9TLJzcD-wu8wO_czuk7J2w
Traditional Origami Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9dkIgRm2U5pNSeDK4oXhEA
🔷 My favorite 6 inch origami paper: https://amzn.to/3h0veDn
🔷 10 inch kami: https://amzn.to/3jPWDJg
🔷 14 inch kami: https://amzn.to/3b39Aw0
Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are act...
Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually touch other, merging into one peanut-shaped star. In some close binaries, matter can flow from one star to the other, changing the way it ages. If one star is a white dwarf, this can cause periodic explosions, and possibly even lead to blowing up the entire star.
Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster
--
Chapters:
Introduction: Binary & Multiple Stars 00:00
Visual Binary Stars 1:45
Spectroscopic Binaries 3:05
Multiple Star Systems 4:15
Eclipsing Binaries 5:44
Contact Binaries 6:53
Stellar Novae 8:31
Review 10:50
--
PBS Digital Studios: http://youtube.com/pbsdigitalstudios
Follow Phil on Twitter: https://twitter.com/badastronomer
Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Patreon: http://www.patreon.com/crashcourse
--
PHOTOS/VIDEOS
Big Dipper http://www.deepskycolors.com/archive/2011/05/14/The-Big-Dipper.html [credit: Rogelio Bernal Andreo]
Sirius https://www.spacetelescope.org/images/heic0516a/ [credit: NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester)]
Sirius A and B http://chandra.harvard.edu/photo/2000/0065/index.html [credit: NASA/SAO/CXC]
Clashing Winds (video) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11680 [credit: NASA's Goddard Space Flight Center]
The Radial Velocity Method (artist’s impression) http://www.eso.org/public/images/eso0722e/ [credit: ESO]
Mizar+Alcor https://commons.wikimedia.org/wiki/File:Thomas_Bresson_-_Mizar%2Balcor_(by).jpg [credit: Wikimedia Commons, Thomas Bresson]
Polaris http://imgsrc.hubblesite.org/hu/db/images/hs-2006-02-e-print.jpg [credit: NASA, ESA, and G. Bacon]
Does the Sun Have Long Lost Siblings? https://www.youtube.com/watch?v=IaWg2ACMspk [credit: SciShow Space]
Clashing Winds (image) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11680 [credit: NASA/C. Reed X-ray images courtesy of NASA/GSFC/S. Immler]
Artist’s impression of the pulsar PSR J0348+0432 and its white dwarf companion http://www.eso.org/public/images/eso1319c/ [credit: ESO/L. Calçada]
Artist’s impression of eclipsing binary http://www.eso.org/public/videos/eso1311b/ [credit: ESO/L. Calçada]
Artist’s impression of the yellow hypergiant star HR 5171 http://www.eso.org/public/images/eso1409b/ [credit: ESO]
Nova http://www.nasa.gov/centers/goddard/news/topstory/2008/keck_ophiuchi_prt.htm [credit: NASA, Casey Reed]
Artist's impression of RS Ophiuchi http://www.jodrellbank.manchester.ac.uk/news/2006/rsoph-radio/ [credit: David A. Hardy/http://www.astroart.org & PPARC]
An artist's impression of Sirius A and B http://www.spacetelescope.org/images/heic0516b/ [credit: NASA, ESA and G. Bacon (STScI)]
Artist's impression of vampire star http://www.spacetelescope.org/videos/astro_bn/ [credit: ESO/M. Kornmesser]
Type Ia supernova http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10532 [credit: Walt Feimer, NASA/Goddard Space Flight Center]
Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually touch other, merging into one peanut-shaped star. In some close binaries, matter can flow from one star to the other, changing the way it ages. If one star is a white dwarf, this can cause periodic explosions, and possibly even lead to blowing up the entire star.
Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster
--
Chapters:
Introduction: Binary & Multiple Stars 00:00
Visual Binary Stars 1:45
Spectroscopic Binaries 3:05
Multiple Star Systems 4:15
Eclipsing Binaries 5:44
Contact Binaries 6:53
Stellar Novae 8:31
Review 10:50
--
PBS Digital Studios: http://youtube.com/pbsdigitalstudios
Follow Phil on Twitter: https://twitter.com/badastronomer
Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Patreon: http://www.patreon.com/crashcourse
--
PHOTOS/VIDEOS
Big Dipper http://www.deepskycolors.com/archive/2011/05/14/The-Big-Dipper.html [credit: Rogelio Bernal Andreo]
Sirius https://www.spacetelescope.org/images/heic0516a/ [credit: NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester)]
Sirius A and B http://chandra.harvard.edu/photo/2000/0065/index.html [credit: NASA/SAO/CXC]
Clashing Winds (video) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11680 [credit: NASA's Goddard Space Flight Center]
The Radial Velocity Method (artist’s impression) http://www.eso.org/public/images/eso0722e/ [credit: ESO]
Mizar+Alcor https://commons.wikimedia.org/wiki/File:Thomas_Bresson_-_Mizar%2Balcor_(by).jpg [credit: Wikimedia Commons, Thomas Bresson]
Polaris http://imgsrc.hubblesite.org/hu/db/images/hs-2006-02-e-print.jpg [credit: NASA, ESA, and G. Bacon]
Does the Sun Have Long Lost Siblings? https://www.youtube.com/watch?v=IaWg2ACMspk [credit: SciShow Space]
Clashing Winds (image) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11680 [credit: NASA/C. Reed X-ray images courtesy of NASA/GSFC/S. Immler]
Artist’s impression of the pulsar PSR J0348+0432 and its white dwarf companion http://www.eso.org/public/images/eso1319c/ [credit: ESO/L. Calçada]
Artist’s impression of eclipsing binary http://www.eso.org/public/videos/eso1311b/ [credit: ESO/L. Calçada]
Artist’s impression of the yellow hypergiant star HR 5171 http://www.eso.org/public/images/eso1409b/ [credit: ESO]
Nova http://www.nasa.gov/centers/goddard/news/topstory/2008/keck_ophiuchi_prt.htm [credit: NASA, Casey Reed]
Artist's impression of RS Ophiuchi http://www.jodrellbank.manchester.ac.uk/news/2006/rsoph-radio/ [credit: David A. Hardy/http://www.astroart.org & PPARC]
An artist's impression of Sirius A and B http://www.spacetelescope.org/images/heic0516b/ [credit: NASA, ESA and G. Bacon (STScI)]
Artist's impression of vampire star http://www.spacetelescope.org/videos/astro_bn/ [credit: ESO/M. Kornmesser]
Type Ia supernova http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10532 [credit: Walt Feimer, NASA/Goddard Space Flight Center]
A brief look at binary star systems. Enjoy!
If you like this sort of video, please leave a thumbs up.
Program:
Space Engine
http://en.spaceengine.org/
Music:
...
A brief look at binary star systems. Enjoy!
If you like this sort of video, please leave a thumbs up.
Program:
Space Engine
http://en.spaceengine.org/
Music:
Space Music - Nova
https://www.youtube.com/watch?v=1AEujqXRJco
A brief look at binary star systems. Enjoy!
If you like this sort of video, please leave a thumbs up.
Program:
Space Engine
http://en.spaceengine.org/
Music:
Space Music - Nova
https://www.youtube.com/watch?v=1AEujqXRJco
How to make a Paper Ninja Star - Origami.
How to make a Double Ninja Star.
Easy Origami Tutorial.
Thank You For Watching.
SUBSCRIBE for more awesome tutorials....
How to make a Paper Ninja Star - Origami.
How to make a Double Ninja Star.
Easy Origami Tutorial.
Thank You For Watching.
SUBSCRIBE for more awesome tutorials.
Intro Music : Dub Zap (Downloaded From the YouTube Audio Library)
Background Music:
Get_Back_Up
(Downloaded from the YouTube Audio Library)
Outro Music: Jim Yosef & Alex Skrindo - Passion [NCS Release]
Learn : How to make a Paper Ninja Star.
How to make a Paper Double Ninja Star - Origami.
TheCrazyTutorials
How to make a Paper Ninja Star - Origami.
How to make a Double Ninja Star.
Easy Origami Tutorial.
Thank You For Watching.
SUBSCRIBE for more awesome tutorials.
Intro Music : Dub Zap (Downloaded From the YouTube Audio Library)
Background Music:
Get_Back_Up
(Downloaded from the YouTube Audio Library)
Outro Music: Jim Yosef & Alex Skrindo - Passion [NCS Release]
Learn : How to make a Paper Ninja Star.
How to make a Paper Double Ninja Star - Origami.
TheCrazyTutorials
Uncle diy youtube video of rubberband double star with 1 rubber band and 2 rubber bands technique. This is the simple easy way to make a double stars band.
Mus...
Uncle diy youtube video of rubberband double star with 1 rubber band and 2 rubber bands technique. This is the simple easy way to make a double stars band.
Music: Mangoe
Musician: Jeff Kaale
Uncle diy youtube video of rubberband double star with 1 rubber band and 2 rubber bands technique. This is the simple easy way to make a double stars band.
Music: Mangoe
Musician: Jeff Kaale
How to make a Rubberband alphabet A with 1 Rubberband. This is a tutorial video from Uncle DIY newly create way to make this Rubberband A.
橡皮筋教学: A 英文字 橡皮筋
Ba...
How to make a Rubberband alphabet A with 1 Rubberband. This is a tutorial video from Uncle DIY newly create way to make this Rubberband A.
橡皮筋教学: A 英文字 橡皮筋
Background music: free copyright music
How to make a Rubberband alphabet A with 1 Rubberband. This is a tutorial video from Uncle DIY newly create way to make this Rubberband A.
橡皮筋教学: A 英文字 橡皮筋
Background music: free copyright music
How to make a rubber band star, double stars, triple stars with one rubber band by uncle diy youtube video. This easy 1 rubber band tricks show step by step how to make 1 star to 2 stars to 3stars.
Music: Maipen Lei
Site: https://icons8.com/music/
Uncle diy youtube video of how to make a double star origami rubber band with 1 rubber band for kids. Easy Step by step diy simple trick just by using 1 rubber band to form this origami double stars. This is a popular old games that bring a lot of fun memory. 双星橡皮筋制作方法童年回忆玩意。
A simple step-by-step tutorial on how to fold a napkin into a double star. Add some elegance to your wedding, holiday, party, or event with fancy napkin origami. It works great with a cloth napkin or paper napkin.
I am using a 17 inch cloth napkin, but you can use a paper napkin, handkerchief / hanky, or a napkin of any size as long as it’s a square.
Napkin Folding Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL-4ezdEpGyqKV3B1Zb6qkdn
Napkin Silverware Pocket Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9TLJzcD-wu8wO_czuk7J2w
Traditional Origami Tutorials Playlist:
https://www.youtube.com/playlist?list=PLA-wG7reuXL9dkIgRm2U5pNSeDK4oXhEA
🔷 My favorite 6 inch origami paper: https://amzn.to/3h0veDn
🔷 10 inch kami: https://amzn.to/3jPWDJg
🔷 14 inch kami: https://amzn.to/3b39Aw0
Double stars are stars that appear to be near each other in the sky, but if they’re gravitationally bound together we call them binary stars. Many stars are actually part of binary or multiple systems. If they are close enough together they can actually touch other, merging into one peanut-shaped star. In some close binaries, matter can flow from one star to the other, changing the way it ages. If one star is a white dwarf, this can cause periodic explosions, and possibly even lead to blowing up the entire star.
Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster
--
Chapters:
Introduction: Binary & Multiple Stars 00:00
Visual Binary Stars 1:45
Spectroscopic Binaries 3:05
Multiple Star Systems 4:15
Eclipsing Binaries 5:44
Contact Binaries 6:53
Stellar Novae 8:31
Review 10:50
--
PBS Digital Studios: http://youtube.com/pbsdigitalstudios
Follow Phil on Twitter: https://twitter.com/badastronomer
Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Patreon: http://www.patreon.com/crashcourse
--
PHOTOS/VIDEOS
Big Dipper http://www.deepskycolors.com/archive/2011/05/14/The-Big-Dipper.html [credit: Rogelio Bernal Andreo]
Sirius https://www.spacetelescope.org/images/heic0516a/ [credit: NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester)]
Sirius A and B http://chandra.harvard.edu/photo/2000/0065/index.html [credit: NASA/SAO/CXC]
Clashing Winds (video) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11680 [credit: NASA's Goddard Space Flight Center]
The Radial Velocity Method (artist’s impression) http://www.eso.org/public/images/eso0722e/ [credit: ESO]
Mizar+Alcor https://commons.wikimedia.org/wiki/File:Thomas_Bresson_-_Mizar%2Balcor_(by).jpg [credit: Wikimedia Commons, Thomas Bresson]
Polaris http://imgsrc.hubblesite.org/hu/db/images/hs-2006-02-e-print.jpg [credit: NASA, ESA, and G. Bacon]
Does the Sun Have Long Lost Siblings? https://www.youtube.com/watch?v=IaWg2ACMspk [credit: SciShow Space]
Clashing Winds (image) http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11680 [credit: NASA/C. Reed X-ray images courtesy of NASA/GSFC/S. Immler]
Artist’s impression of the pulsar PSR J0348+0432 and its white dwarf companion http://www.eso.org/public/images/eso1319c/ [credit: ESO/L. Calçada]
Artist’s impression of eclipsing binary http://www.eso.org/public/videos/eso1311b/ [credit: ESO/L. Calçada]
Artist’s impression of the yellow hypergiant star HR 5171 http://www.eso.org/public/images/eso1409b/ [credit: ESO]
Nova http://www.nasa.gov/centers/goddard/news/topstory/2008/keck_ophiuchi_prt.htm [credit: NASA, Casey Reed]
Artist's impression of RS Ophiuchi http://www.jodrellbank.manchester.ac.uk/news/2006/rsoph-radio/ [credit: David A. Hardy/http://www.astroart.org & PPARC]
An artist's impression of Sirius A and B http://www.spacetelescope.org/images/heic0516b/ [credit: NASA, ESA and G. Bacon (STScI)]
Artist's impression of vampire star http://www.spacetelescope.org/videos/astro_bn/ [credit: ESO/M. Kornmesser]
Type Ia supernova http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10532 [credit: Walt Feimer, NASA/Goddard Space Flight Center]
A brief look at binary star systems. Enjoy!
If you like this sort of video, please leave a thumbs up.
Program:
Space Engine
http://en.spaceengine.org/
Music:
Space Music - Nova
https://www.youtube.com/watch?v=1AEujqXRJco
How to make a Paper Ninja Star - Origami.
How to make a Double Ninja Star.
Easy Origami Tutorial.
Thank You For Watching.
SUBSCRIBE for more awesome tutorials.
Intro Music : Dub Zap (Downloaded From the YouTube Audio Library)
Background Music:
Get_Back_Up
(Downloaded from the YouTube Audio Library)
Outro Music: Jim Yosef & Alex Skrindo - Passion [NCS Release]
Learn : How to make a Paper Ninja Star.
How to make a Paper Double Ninja Star - Origami.
TheCrazyTutorials
Uncle diy youtube video of rubberband double star with 1 rubber band and 2 rubber bands technique. This is the simple easy way to make a double stars band.
Music: Mangoe
Musician: Jeff Kaale
How to make a Rubberband alphabet A with 1 Rubberband. This is a tutorial video from Uncle DIY newly create way to make this Rubberband A.
橡皮筋教学: A 英文字 橡皮筋
Background music: free copyright music
In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
This can happen either because the pair forms a binary star, i.e. a binary system of stars in mutual orbit, gravitationally bound to each other, or because it is an optical double, a chance alignment of two stars in the sky that lie at different distances. Binary stars are important to stellar astronomers as knowledge of their motions allows direct calculation of stellar mass and other stellar parameters.
Since the beginning of the 1780s, both professional and amateur double star observers have telescopically measured the distances and angles between double stars to determine the relative motions of the pairs. If the relative motion of a pair determines a curved arc of an orbit, or if the relative motion is small compared to the common proper motion of both stars, it may be concluded that the pair is in mutual orbit as a binary star. Otherwise, the pair is optical.Multiple stars are also studied in this way, although the dynamics of multiple stellar systems are more complex than those of binary stars.