New evidence shows that, far beyond Pluto, there may exist a hypothetical planet referred to as Planet X or Planet Nine.

When it comes to planets in our Solar System's habitable zone, one world is too close to the Sun, another is too far and ...

A rocky exoplanet outside the Earth's solar system may have an atmosphere, according to new evidence gathered by NASA ...

Harvard Professor Avi Loeb explains that alignments between interstellar object 3I/ATLAS and gamma-ray bursts are ...

Scientists have discovered the strongest evidence yet of a rocky planet with an atmosphere outside the solar system, challenging previous notions that small planets that orbit closely to their stars ...

The interstellar comet 3I/ATLAS reaches its closest point to Earth on Dec. 19, allowing close study with no threat to the ...

A study of the interstellar comet 3I/ATLAS reveals surprising characteristics: traveling at 57 km/s, it challenges ...

The interstellar comet 3I/ATLAS is racing away from the sun. Hubble and JWST track the object's strange composition: high CO2 ...

I/ATLAS attracted attention when it was confirmed to be only the third body originating from another star system.

Scientists may have discovered an atmosphere on a distant planet. Astronomers at NASA used the James Webb Space Telescope to detect evidence suggesting that the rocky planet called TOI-561 b, aka ...

Seattle-area startup Hyviva is challenging the Tesla Powerwall with its hydrogen-fueled 'Lego brick' energy storage system.

Harvard physicist Avi Loeb slams government secrecy on UAPs and 3I/ATLAS, urging intelligence to focus on security while ...