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Strictly speaking, the Earth’s gravity will always pull on an object, no matter how distant. Gravity is a force that obeys an ‘inverse square law’. So, for example, put an object twice as far away and it will feel a quarter of the force. Put it four times further away and it will feel one-sixteenth the force.
Mar 22, 2023 · A strange comet-like object discovered over five years ago was the first known visitor from another solar system. Its movement was so odd that scientists struggled to explain it, until now.
Hubble gets clear images because it’s above Earth’s atmosphere, not because it travels or flies closer to cosmic objects. Hubble isn’t that far away, but its location above the murky atmosphere allows the telescope to get a clear view of the universe.
Whenever we talk about motion, we mean that some object is changing its position relative to another object. On Earth, we generally measure position, and therefore motion, relative to the ground, but this is just for the sake of convenience. As we have already pointed out, Earth itself is in motion.
Mar 19, 2024 · The first source was aboard DART: The spacecraft captured images as it approached the asteroid and sent them back to Earth via NASA’s Deep Space Network . These images provided close-up measurements of the gap between Didymos and Dimorphos while also gauging the dimensions of both asteroids just prior to impact.
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Oct 20, 2022 · In the days following the event, NASA received images of the impact from a cubesat, LICIACube, that was deployed by DART before impact. The cubesat, which was provided by the Italian Space Agency, captured images of the impact and the ejecta cloud.
