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Galaxies and galaxy clusters < 50 M ly away from Earth plotted in the supergalactic plane. The supergalactic coordinate system is a reference frame for the supercluster of galaxies that contains the Milky Way galaxy, referenced to a local relatively flat collection of galaxy clusters used to define the supergalactic plane.
Gaia BH1 is 1,560 light-years away from Earth in the direction of the constellation Ophiuchus. [ 3 ] For comparison, the nearest star to the Sun ( Proxima Centauri ) is about 4.24 light years away, and the Milky Way galaxy is approximately 100,000 light years in diameter.
In November 2013, it was estimated that 22±8% of Sun-like [a] stars in the Milky Way galaxy may have an Earth-sized [b] planet in the habitable [c] zone. [ 8 ] [ 115 ] Assuming 200 billion stars in the Milky Way, [ d ] that would be 11 billion potentially habitable Earths, rising to 40 billion if red dwarfs are included.
This is a list of exoplanets within the circumstellar habitable zone that are either under 10 Earth masses or smaller than 2.5 Earth radii, and thus have a chance of being rocky. [ 3 ] [ 1 ] Note that inclusion on this list does not guarantee habitability, and in particular the larger planets are more unlikely to have a rocky composition. [ 4 ]
The planet has 6.9 Earth masses and 1.8–2.4 Earth radii, and with its close orbit receives 40 percent more stellar radiation than Earth, leading to surface temperatures of about 60° C. [ 144 ] [ 145 ] [ 146 ] HD 40307 g , a candidate planet tentatively discovered in November 2012, is in the circumstellar habitable zone of HD 40307 . [ 147 ]
List of nearest exoplanets. Fomalhaut b (Dagon), 25 light-years away, with its parent star Fomalhaut blacked out, as pictured by Hubble in 2012. [ 1 ] In 2020 this object was determined to be an expanding debris cloud from a collision of asteroids rather than a planet. [ 2 ] There are 7,026 known exoplanets, or planets outside the Solar System ...
Contents. List of largest exoplanets. Jupiter as seen by Voyager 1 in 1979. It is the largest planet having its surface resolved [ 1 ][ 2 ][ 3 ] and it is the largest planet in the Solar System. [ 4 ] Below is a list of the largest exoplanets so far discovered, in terms of physical size, ordered by radius.
The atmosphere has a mass of about 5.15 × 10 18 kg, [3] three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The atmosphere becomes thinner with increasing altitude, with no definite boundary between the atmosphere and outer space. The Kármán line, at 100 km (62 mi) or 1.57% of Earth's radius, is often used as ...