Our first challenge here is defining the size of the Solar System. Neptune orbits the Sun at an average distance of 30 AU . The Oort cloud may extend to as far as 100,000 AU from the Sun.

On July 1, 2025, the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey telescope, located in northern Chile, ...

It was only discovered last month (1 July) by the ATLAS survey telescope in Chile and NASA was quick to confirm that the ...

The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of ...

Our solar system may be an oddball in the universe. ... Earth Resides in Oddball Solar System, Alien Worlds Show. News. By Elizabeth Howell ( space.com-astronomy) published 16 January 2018 ...

Comet or asteroid heading for the Sun is only the third time an interstellar object has been spotted inside our group of ...

They make the case that Proxima-b, only 4.24 light-years away from our solar system and the closest known Earth-like rocky planet (though we know almost nothing about it), receives 250 times more ...

But according to a new study published in the Monthly Notices of the Royal Astronomical Society, there is now a cluster of interstellar asteroids within our solar system hiding in plain sight.

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It’s not a spaceship, but it is an alien visitor in its own right—a colossal ...

CalTech researchers have released a working concept of what Earth may look like from other exoplanets. The two-dimensional alien map in the image above depicts Earth as an exoplanet. To make the ...

Oldest Known Solar System Discovered The discovery of Earth-size planets in an 11.2 billion-year-old star system suggests life could have existed for billions of years, scientists say.