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Hace 5 días · The Andromeda Galaxy is surrounded by a massive halo of hot gas that is estimated to contain half the mass of the stars in the galaxy. The nearly invisible halo stretches about a million light-years from its host galaxy, halfway to our Milky Way Galaxy. Simulations of galaxies indicate the halo formed at the same time as the ...
Hace 2 días · Proxima Centauri is a small, low-mass star located 4.2465 light-years (1.3020 pc) away from the Sun in the southern constellation of Centaurus.Its Latin name means the 'nearest [star] of Centaurus'. It was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun. With a quiescent apparent magnitude of 11.13, it is too faint to be seen with the unaided eye.
Hace 3 días · The instantaneous distance varies by about ± 2.5 million km or 1.55 million miles as Earth moves from perihelion on ~ January 3rd to aphelion on ~ July 4th. ... Illustration of different stars' internal structure based on mass. ... Stellar flybys that pass within 0.8 light-years of the Sun occur roughly once every 100,000 years.
Hace 4 días · Q: What exactly is a light-year? A light-year is a unit of measurement used to describe the distance that light travels in one year. It is approximately 5.88 trillion miles or 9.46 trillion kilometers. Q: Can anything travel faster than a light-year? No, the speed of light is considered the ultimate speed limit in the universe.
2 de mar. de 2024 · Distance from the Earth: ≈ 550 light-years; Rotation period: unknown; How big is Antares? Antares is one of the largest known stars. It is about 700 times larger in diameter than the Sun.
Hace 1 día · At one end of the galaxy is the Sun, which is about 25,000 light years away from the center of the Milky Way. The speed of light is 300,000 kilometers (186,000 miles) per second, it would still take 25,000 years to reach the middle of the Milky Way.
Hace 3 días · NASA announced the discovery of a planet 40 light years from Earth that orbits every 12.8 days and is possibly even habitable. Gliese 12 b is a "super Earth exoplanet" that is nearly the same size ...
