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13 hours ago · Exoplanets within 10 parsecs Key to colors ° Mercury, Earth and Jupiter (for comparison purposes) # Confirmed multiplanetary systems ↑ Exoplanets believed to be potentially habitable Confirmed exoplanets Host star system Companion exoplanet (in order from star) Notes and additional planetary observations Name Distance (ly) Apparent magnitude (V) Mass (M ☉) Label Mass (M E) Radius (R ...
13 hours ago · In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun.The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.
13 hours ago · Voyager 1 has reached a distance of 23.381 billion km (14.528 billion mi; 156.29 AU) from Earth and 23.483 billion km (14.592 billion mi; 156.97 AU) from the Sun. 2023-11-14 Issues with onboard computer render it unable to send usable data back to Earth, engineers begin planning and developing a fix. 2024-04-22
- September 5, 1977, 12:56:00 UTC
- Titan IIIE
- 815 kg (1,797 lb)
13 hours ago · Symbols for the Sun and Moon The use of astronomical symbols for the Sun and Moon dates to antiquity. The forms of the symbols that appear in the original papyrus texts of Greek horoscopes are a circle with one ray for the Sun and a crescent for the Moon. The modern Sun symbol, a circle with a dot (☉), first appeared in Europe in the Renaissance. The symbol for the Sun in late Classical (4th ...
13 hours ago · First rover to make a soft landing on another planet. 4.5 kg (9.9 lb) rover connected to the Mars 3 lander by a tether. Deployment status unknown due to loss of communications with the Mars 3 lander. Deployment status unknown due to loss of communications with the Mars 3 lander.
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13 hours ago · History Early history. The hypothesis of dark matter has an elaborate history. In the appendices of the book Baltimore lectures on molecular dynamics and the wave theory of light where the main text was based on a series of lectures given in 1884, Lord Kelvin discussed the potential number of stars around the Sun from the observed velocity dispersion of the stars near the Sun, assuming that ...
13 hours ago · Etymology Atlas and the Hesperides by John Singer Sargent (1925). The etymology of the name Atlas is uncertain. Virgil took pleasure in translating etymologies of Greek names by combining them with adjectives that explained them: for Atlas his adjective is durus, "hard, enduring", which suggested to George Doig that Virgil was aware of the Greek τλῆναι "to endure"; Doig offers the ...
