The size of the solar system is defined by the volume of space over which the sun’s influence exceeds those of other nearby stars in the Milky Way galaxy.

The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many more are waiting to be discovered?

Travel through time to witness some of the most remarkable episodes in our solar system's history, uncovering its ancient ...

How many moons are in the solar system? Speaking of which, it's time to test your knowledge of our stellar neighborhood with our solar system quiz. If you need a hint, click the yellow button.

How Fast Does A Spacecraft Need To Go To Escape The Solar System? It’s not just about speed, it is also about orbital positions, and what exactly you are running from.

Solar eclipses occur when the moon gets between Earth and the sun. This causes the moon to cast a shadow onto Earth. A solar eclipse can only take place at the phase of new moon, but different ...

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

The size of the solar system is defined by the volume of space over which the Sun’s influence exceeds those of other nearby stars in the Milky Way galaxy. This influence derives from two ...