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Size (left) and distance (right) of a few well-known galaxies put to scale. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.
Dark matter (26.8%) Dark energy (68.3%) [6] The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the ...
As the second brightest star in the northern sky, Vega has names in numerous cultures. In Chinese, it is known as 織女 ('weaving girl') from the Qi Xi love story. Vega is one of the vertices of the Summer Triangle asterism. /ˈviːɡə, ˈveɪɡə/ Andromeda: 14 Andromedae A: Veritate: IAU new 2015 Latin for 'where there is truth'. /ˌvɛr ...
Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers are expecting a “new star” to appear in the night sky anytime between now and September ...
Webb's First Deep Field is the first operational image taken by the James Webb Space Telescope (JWST). The deep-field photograph, which covers a tiny area of sky visible from the Southern Hemisphere, is centered on SMACS 0723, a galaxy cluster in the constellation of Volans. Thousands of galaxies are visible in the image, some as old as 13 ...
This illustrates the fact that there are far more faint stars than bright stars: in the entire sky, there are about 500 stars brighter than apparent magnitude 4 but 15.5 million stars brighter than apparent magnitude 14. The apex of the Sun's way, or the solar apex, is the direction that the Sun travels through space in the Milky Way.
One of the nearest supernova candidates and the sixteenth-brightest star in the night sky. Regulus A (α Leonis) 4.35 ± 0.1: The nearest B-type star to the Earth. Vega (α Lyrae) 2.726 ± 0.006 × 2.418 ± 0.012: Fifth brightest star in the night sky. Altair (α Aquilae) 2.01 × 1.57: Twelfth brightest star in the night sky. Sirius A (α Canis ...
IAU designated constellations. In contemporary astronomy, 88 constellations are recognized by the International Astronomical Union (IAU). [1] Each constellation is a region of the sky bordered by arcs of right ascension and declination, together covering the entire celestial sphere. Their boundaries were officially adopted by the International ...