Distances to celestial bodies are crucial in astronomy. They allow astronomers to understand the structure of the Universe; for example, to see the organization of the Solar System and to recognize that galaxies lie beyond the Milky Way. The derived physical sizes of bodies scale with the ...
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What is the range of the Oort cloud in astronomical units? On the 1 to 10 billion scale, about how far is it to the nearest stars besides the sun? 1. 4 km 2. 400 km 3. 1,000 km 4. 4,400 km 5. 10,000 km How far away can the Hubble Space Telescope detect galaxies?
We present the first sample of quasi-stellar objects (QSOs) behind the southern satellite galaxies of the Milky Way. These objects were sought for use as unresolved, inertial reference objects in proper motion studies of the Fornax, Carina and Sculptor dwarf spheroidal galaxies and the Small Mage...
One tail trails the star cluster, the other pulls out ahead of it. They are known as tidal tails, and have been widely studied in colliding galaxies but no one had ever seen them from a nearby open star cluster, until very recently. ...
James Webb Space Telescope captures thousands of galaxies in a cosmic 'feast' (image) Astronomers gaze into 'dark nebula' 60 times the size of the solar system (video) Latest SpaceX Falcon 9 rocket launches 28 Starlink satellites to orbit from Florida (photos) See more latest Most Popular ...
In August 2016, astronomers announced that a roughly Earth-sizeexoplanetcircles the closest star to the sun, thered dwarfProxima Centauri, which lies a mere 4.2 light-years from us. (For perspective, the Milky Way galaxy's spiral disk is about 100,000 light-years wide.) ...
Today, there are more than 5,000 confirmed extrasolar planets in our galaxy alone, with over 2,600 of those discovered by the Kepler satellite telescope during its nine years of operation. In 2018, however, astronomers began discovering extrasolar planets in other galaxies....
Using the "Updated Nearby Galaxy Catalog", we consider different properties of companion galaxies around luminous hosts in the Local Volume. The data on stellar masses, linear diameters,surface brightnesses, HI-richness, specific star formation rate (sSFR), and morphological types are discussed for ...
earth seemed to be just a small bit of dust.It is only a small planet,and travels around the sun.The sun together with its planets,travels in the Milky Way,our galaxy.The Milky Way has about thirty billion stars like our sun,and is one of about a hundred million galaxies in the ...