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C/2024 G3 (ATLAS) is a non-periodic comet, which reached perihelion on 13 January 2025, at a distance of 0.09 AU (13 million km) from the Sun.It is potentially the brightest comet of 2025, [6] with an apparent magnitude reaching −3.8 on the day of its perihelion. [5]
As space objects go, comets and meteors are not very big. While a planet like Earth is about 8,000 miles in diameter and a star like our Sun is about 865,000 miles across, the largest asteroid ...
As of 2022, three bodies in the Solar System, the Moon, Mars and Ryugu [71] have been visited by mobile rovers. The first robotic rover to visit another celestial body was the Soviet Lunokhod 1, which landed on the Moon in 1970. The first to visit another planet was Sojourner, which travelled 500 metres across the surface of Mars in 1997.
Revised data from June 2024 suggested that the comet would brighten to an apparent magnitude of 2.2, assuming H = 6 and 2.5n = 7.5, which is the average brightening rate of long-period comets in the inner Solar System. However, the comet was expected to be at least one magnitude brighter due to the effects of forward scattering, which could ...
As of 2022 there are no mission proposals to C/2014 UN 271, nor are there any upcoming missions that can be retargeted to the comet. The European Space Agency's upcoming Comet Interceptor mission, which will launch in 2029 and make a flyby of a long-period comet within Earth's orbit, will not be able to reach C/2014 UN 271 due to its large ...
Both moons, which bring the total of Neptune’s known natural satellites to 18, were first spotted in September 2021, but required follow-up observations with different telescopes over the past ...
Some moons, minor planets and comets of the Solar System to scale (major planets not to scale) Selected moons, with Earth to scale. Nineteen moons are large enough to be round, and two, Titan and Triton, have substantial atmospheres The number of moons discovered in each year until November 2019
There are 293 confirmed moons in our cosmic neighborhood. By studying these worlds, astronomers hope to learn about ancient asteroid collisions, space volcanoes, and the origins of life itself.