NASA’s discovery of potential evidence of ancient life on Mars means “our galaxy could be teeming with life,” says a ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Blocks of frozen carbon dioxide sliding down Martian dunes may have carved the planet’s strange gullies, mimicking the work ...

A European Mars probe witnessed the interstellar comet 3I/ATLAS' Red Planet flyby on Oct. 3, snapping imagery of the interloper from just 19 million miles (30 million kilometers) away.

The solar system is composed of the sun, eight major planets, five dwarf planets, over a hundred moons, and countless comets ...

The Red Planet has a bloody history. Newly examined data from NASA's retired InSight lander suggest that there may be giant chunks of rocky material deep inside the mantle of Mars, which were lodged ...

Interstellar comet 3I/ATLAS has caught the interest of astronomers and amateur enthusiasts alike as just the third object to enter our solar system.

Siraj’s Planet Y search started about a year ago when he was trying to find out whether the shape of the Kuiper Belt is flat. “The planets of the solar system have slight tilts up and down, but ...

What makes 3I/ATLAS especially intriguing is that the comet might be three billion years older than our entire Solar System.

Our solar system now, once again, officially consists of only eight planets. Although largely debunked, speculation continued ...