The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...
Smithsonian Magazine on MSN
Astronomers Say Earth Has a Newly Discovered ‘Quasi-Moon,’ a Companion That Shares Its Orbit Around the Sun
Researchers are discussing 2025 PN7, a small celestial body that's following a similar orbital path to our planet's without being gravitationally tied to Earth ...
Scientists have discovered a previously unknown quasi-moon that’s been shadowing Earth’s orbit for decades, undetected, and will likely remain there for a few decades more. The quasi-moon, named 2025 ...
The 2024 PT5 "mini-moon" asteroid will soon be in Earth's orbit. Here's everything you need to know about this celestial event.
A NASA spacecraft erected a large, foil solar sail in orbit around Earth last week, after a failed attempt days earlier. However, subsequent observations of the spacecraft show it is "tumbling or ...
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