The Andromeda Galaxy (/ænˈdrɒmᵻdə/), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Being approximately 220,000 light years across, it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies.
Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the largest in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion (1012) stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.
The Andromeda Galaxy is estimated to be 1.5×1012solar masses, while the mass of the Milky Way is estimated to be 8.5×1011 solar masses. In comparison, a 2009 study estimated that the Milky Way and M31 are about equal in mass, while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. The Milky Way and Andromeda are expected to collide in 3.75 billion years, eventually merging to form a giant elliptical galaxy or perhaps a large disk galaxy.
It was a thing called dreaming, and it rose up out of the trillions of synapses and neurones that flickered and glowed inside their brains – more of them in each brain than there were stars in the entire swirling mass of a spiral galaxy.
By CHRISTINA LARSON. WASHINGTON (AP) — It’s a treat to see a supermoon ...The Leonids are known for their high-speed meteors, which can travel at up to 44 miles per second (70 kilometers per second) ... Skywatch. Go the distance with the AndromedaGalaxy ... .
Boaters could face lower speed zones and campers could be asked to pay to reserve camping spots under changes being proposed for the St. CroixNationalScenic Riverway as part of a new management plan ... St ... 8 ... Go the distance with the AndromedaGalaxy ... St.
The most prominent of these spirals is the Andromeda nebula which is barely visible without binoculars ... In fact, the Andromeda nebula was another galaxy, in some ways similar to the Milky Way ... These spiral “nebulae” then became known as galaxies.
Your neighbors may think you’ve cracked up sitting out there in the winter, but you’re on a mission! You’re out in the cold to find the AndromedaGalaxy, the next-door neighbor to our own Milky Way...
This is not carelessness, but the possible discovery of a rare stellar event in the Andromeda galaxy ... its host galaxy ... This was N6946-BH1 - found 22 million light-years away in the NGC 6946 galaxy.
New research shows how one massive, hydrogen-depleted supergiant star in the Andromeda galaxy (M31) failed to detonate as a supernova ... A survey with the Large Binocular Telescope monitored 27 nearby galaxies, looking for disappearing massive stars.
Gdnzduts GalaxyProjector... The HomestarFlux comes with two discs, the Northern Hemisphere and the Northern Hemisphere with constellation lines; it also supports additional discs that feature the Andromeda Galaxy, the southern hemisphere, and more.
Using the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), Chinese astronomers have identified nearly 300 candidate supergiant stars in the Andromeda and Triangulum galaxies.
“He (my father) was there for pilot training with the military ... Jay was born in Moose Jaw ... “Her grandson Justin made a beautiful toast about her love of family, caring nature, and their common bond around the AndromedaGalaxy.” ... .
... what phrases such as “hundreds of billions of stars” (the size of the Milky Way, according to West) or “2.5 million light years” (the distance to the next galaxy, Andromeda) actually signify.
Aiken Standard
16 Nov 2024
Aiken Standard
16 Nov 2024