Search results
Results from the WOW.Com Content Network
The second full orbit of Neptune around the Sun since its discovery in 1846. 2177 "First Plutonian anniversary" of Pluto's discovery, given its orbit is just under 248 Earth years. 2178 January 28 2182 September 24 With an estimated probability of 0.04%, asteroid 101955 Bennu could hit Earth. 2185 Triple conjunction Mars–Saturn [56] 2186 July 16
Five planets are going to be retrograde in the summer of 2024. Here are the dates for Mercury retrograde, Venus retrograde, Saturn retrograde, Neptune retrograde, Pluto retrograde and more.
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
Pluto's origin and identity had long puzzled astronomers. One early hypothesis was that Pluto was an escaped moon of Neptune [161] knocked out of orbit by Neptune's largest moon, Triton. This idea was eventually rejected after dynamical studies showed it to be impossible because Pluto never approaches Neptune in its orbit. [162]
Called a "mini-moon" of sorts by some, it temporarily entered Earth's orbit on Sept. 29 from the Arjuna asteroid belt, which follows a similar orbital path around the sun as the Earth.
Lunar programme test flight in Earth orbit (uncrewed) [113] Pioneer 8: 13 December 1967 "Space weather" observations [75] [114] [115] Surveyor 7: 7 January 1968 Lunar lander [116] [117] Apollo 5: 22 January 1968 Lunar programme test flight in Earth orbit (uncrewed) [118] [119] Zond 4: 2 March 1968 Lunar programme test flight out of Earth orbit ...
The bright S/2002 N5 moon is 14 miles (23 kilometers) in diameter and takes nearly nine years to complete an orbit of Neptune, while faint S/2021 N1 is about 8.7 miles (14 kilometers) across and ...
1868 – Jules Janssen observes a bright yellow line with a wavelength of 587.49 nanometers in the spectrum of the chromosphere of the Sun, during a total solar eclipse in Guntur, India. Later in the same year, Norman Lockyer observed the same line in the solar spectrum, and concluded that it was caused by an element in the Sun unknown on Earth.