Size matters when it comes to telescopes. The bigger they are, the farther they can see. Prioritizing constructing large ones ...

The team has estimated that the planet is about 22 percent the mass of Jupiter, so roughly a Saturn-sized world. It is ...

Astronomers just measured the mass of a free-floating planet without a star for the first time ...

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The Manhattan-size interstellar object 3I/ATLAS exhibited signs of non-gravitational acceleration and appeared “bluer than the sun” as it passed our local star — which could be signs of an alien craft ...

The Manhattan-size interstellar object 3I/ATLAS will buzz past Mars this week — making its closest pass to any planet on its route as scientists are rushing to coordinate craft to observe the ...

For over two months, astronomers have been closely following an interstellar object — dubbed 3I/ATLAS — as it screams through the solar system at a breakneck speed. The unusual visitor was only the ...

Astronomers have a new theory about planetary formation, and it revolves around one mysterious concept: interstellar visitors. No, not little green men, but rather deep-space wanderers like the ...

Venus is often called Earth's evil twin due to its size, mass, material composition, and density. It even feels like Venus should've become a second Earth. However, it ended up being one of the ...

Interstellar object 3I/ATLAS — which is zooming through our inner solar system has sparked fiery debate after a leading Harvard astronomer suggested it may not be a mere rock — but something far more ...