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Light-year - Wikipedia
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).
Terms and Definitions - Views of the Solar System
A accretion Accumulation of dust and gas into larger bodies. albedo Reflectivity of an object; ratio of reflected light to incident light. albedo feature
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The Universe within 250 Light Years - The Solar Neighbourhood
About the Map This map is a plot of the 1500 most luminous stars within 250 light years. All of these stars are much more luminous than the Sun and most of them can be seen with the naked eye.
The Universe within 14 billion Light Years - The Visible ...
The universe has been partially mapped out to about 2 billion light years. Here is a map showing many of the major superclusters within 2 billion light years.
This star is the farthest ever seen. It’s 9 billion light ...
This star is the farthest ever seen. It's 9 billion light-years away About halfway between Icarus's spiral galaxy and our own was a third object, a massive cluster of galaxies that acted as the lens of the magnifying glass
Observable universe - Wikipedia
The comoving distance from Earth to the edge of the observable universe is about 14.26 gigaparsecs (46.5 billion light-years or 4.40 × 10 26 meters) in any direction. The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 Gly or 8.8 × 10 26 m).
Planet with 30 huge rings discovered 420 light years away ...
The alien Saturn on steroids! Planet with 30 huge rings discovered 420 light years away - and each one is tens of MILLIONS of miles wide. The massive rings were seen eclipsing the young sun-like star J1407
Astronomers find a star INSIDE another star - Mail Online
A star INSIDE a star: Scientists discover neutron star within a supergiant 200,000 light-years from Earth. Astronomers have found a strange hybrid star using a telescope in Chile
Hubble’s High-Definition Panoramic View of the Andromeda ...
The largest NASA Hubble Space Telescope image ever assembled, this portion of the Andromeda galaxy is the sharpest large composite image ever taken of our galactic next-door neighbor.