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- The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the...211 KB (21,091 words) - 02:13, 7 August 2024
- A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially...84 KB (9,738 words) - 04:08, 28 July 2024
- An apsis (from Ancient Greek ἁψίς (hapsís) 'arch, vault'; pl. apsides /ˈæpsɪˌdiːz/ AP-sih-deez) is the farthest or nearest point in the orbit of a planetary...42 KB (3,898 words) - 17:00, 1 August 2024
- The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to...28 KB (3,278 words) - 14:28, 29 July 2024
- The European Space Agency (ESA) is a 22-member intergovernmental body devoted to space exploration. With its headquarters in Paris and a staff of around...121 KB (10,056 words) - 13:16, 26 July 2024
- The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic...53 KB (6,980 words) - 22:53, 31 July 2024
- A neutron star is the collapsed core of a massive supergiant star. It results from the supernova explosion of a massive star—combined with gravitational...113 KB (13,716 words) - 07:45, 29 July 2024
- A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night...67 KB (8,092 words) - 01:49, 4 August 2024
- Alpha Centauri (α Centauri, α Cen, or Alpha Cen) is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil...119 KB (11,276 words) - 19:16, 28 July 2024
- Apparent magnitude (m) is a measure of the brightness of a star, astronomical object or other celestial objects like artificial satellites. Its value depends...65 KB (4,798 words) - 05:39, 7 August 2024
- Cassini–Huygens (/kəˈsiːni ˈhɔɪɡənz/ kə-SEE-nee HOY-gənz), commonly called Cassini, was a space-research mission by NASA, the European Space Agency (ESA)...130 KB (12,092 words) - 14:57, 3 August 2024
- A lunar eclipse is an astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. Such an alignment occurs...27 KB (2,928 words) - 08:34, 5 August 2024
- An atmosphere (from Ancient Greek ἀτμός (atmós) 'vapour, steam' and σφαῖρα (sphaîra) 'sphere') is a layer of gasses that envelop an astronomical object...20 KB (2,075 words) - 10:49, 7 August 2024
- Ursa Major (/ˈɜːrsə ˈmeɪdʒər/; also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into...43 KB (4,777 words) - 04:02, 25 March 2024
- A quake is the result when the surface of a planet, moon or star begins to shake, usually as the consequence of a sudden release of energy transmitted...11 KB (1,397 words) - 02:39, 29 May 2024
- New Horizons is an interplanetary space probe launched as a part of NASA's New Frontiers program. Engineered by the Johns Hopkins University Applied Physics...176 KB (17,512 words) - 19:49, 3 August 2024
- A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another...43 KB (3,569 words) - 10:38, 5 August 2024
- Space Shuttle Columbia (OV-102) was a Space Shuttle orbiter manufactured by Rockwell International and operated by NASA. Named after the first American...52 KB (4,453 words) - 23:46, 7 August 2024
- Brown dwarfs are substellar objects that have more mass than the biggest gas giant planets, but less than the least massive main-sequence stars. Their...186 KB (20,203 words) - 11:53, 6 August 2024
- A spacecraft is a vehicle that is designed to fly and operate in outer space. Spacecraft are used for a variety of purposes, including communications,...49 KB (5,536 words) - 07:15, 28 July 2024