National Oceanic and Atmospheric Administration Contractor, Initially, astronomers believed that our Milky Way Galaxy included the whole universe. How far away is Andromeda Galaxy from the Milky Way Galaxy? Earth 's surface curves out of sight at a distance of 3.1 miles (5 kilometers). Distance Information. Studies of the extended halo of the Andromeda Galaxy show that it is roughly comparable to that of the Milky Way, with stars in the halo being generally "metal-poor", and increasingly so with greater distance. Fueled by gravity, the two galaxies are hurtling toward one another at 402,000 kilometers per hour. Alternative spiral structures have been proposed such as a single spiral arm[80] or a flocculent[81] pattern of long, filamentary, and thick spiral arms. [47][48][49][50] In 2006, the Andromeda Galaxy's spheroid was determined to have a higher stellar density than that of the Milky Way,[51] and its galactic stellar disk was estimated at about twice the diameter of that of the Milky Way. If you cant see the Andromeda galaxy with the eye alone, by all means use binoculars. The LMC is full of interesting objects including diffuse nebulae, globular and open clusters, planetary nebulae, and more. As a result, he was able to come up with a distance estimate of 500,000ly (3.21010AU). Even back then, Andromeda was thought to be a nearby nebula. The Andromeda Galaxy is speeding toward us, but it will take 4 billion years to get here. Youve just landed on the Andromeda galaxy, which looks like a smudge of light to the unaided eye. What distinguishes them from the globular clusters is that they are much largerseveral hundred light-years acrossand hundreds of times less dense. We also link to other websites, but are not responsible for their content. This contradicted earlier measurements that seemed to indicate that the Andromeda Galaxy and Milky Way are almost equal in mass. The Andromeda Galaxy has a very crowded double nucleus. This event produced high rates of star formation across the Andromeda Galaxy's diskeven some globular clustersand disturbed M33's outer disk. more from Astronomy's weekly email newsletter. In 2009, a technique called microlensinga phenomenon caused by the deflection of light by a massive objectmay have led to the first discovery of a planet in the Andromeda Galaxy.[40]. This possible exoplanet would have a mass 6.34 times that of Jupiter. In the sci-fi series "Star Trek," spaceships rapidly travel from one part of the universe to another using warp drives. Check out this cool video: Night sky as Milky Way and Andromeda galaxies merge. [34], In 1943, Walter Baade was the first person to resolve stars in the central region of the Andromeda Galaxy. This article contains incorrect information, This article doesnt have the information Im looking for. You can also star-hop to the Andromeda galaxy, using the Great Square of Pegasus. Andromeda Galaxy, also called Andromeda Nebula, (catalog numbers NGC 224 and M31), great spiral galaxy in the constellation Andromeda, the nearest large galaxy. And much more. Things moving away from us have light that is Doppler shifted toward the red end of the spectrum; things moving toward us have light shifted toward the blue. Simulations of galaxies indicate the halo formed at the same time as the Andromeda Galaxy. Nowadays, amateur astronomers seek out these objects with their telescopes and binoculars. [100], Multiple X-ray sources have since been detected in the Andromeda Galaxy, using observations from the European Space Agency's (ESA) XMM-Newton orbiting observatory. Your privacy is important to us. The spiral arms of the Andromeda Galaxy are outlined by a series of HII regions, first studied in great detail by Walter Baade and described by him as resembling "beads on a string". The nucleus consists of two concentrations separated by 1.5pc (4.9ly).
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