Scientific American spoke with the astronomer who has contributed to the discovery of two thirds of Saturn’s known moons ...

Out of these planets, Mercury and Venus do not have any moons. Every other planet has moons. Both Earth and Mars have confirmed moons with no provisional moons. Jupiter, Saturn, Uranus ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

Astronomers have discovered that the Jupiter, the largest planet in our Solar System, was once so big that it could have held ...

According to their work, Jupiter's radius was once two to two-and-a-half times its current radius—large enough to contain ...

Jupiter has a mass 2.5 times greater than the rest of the planets combined. In the infant years, it was 2.5 times its current ...

The new calculations, described in a paper published Tuesday (May 20) in the journal Nature Astronomy, suggest that just 3.8 ...

For months, President Trump has taunted Canada by claiming it should become America's 51st state. But the country's new prime minister pushed back in an Oval Office meeting. Weijia Jiang reports.

But do other planets have seasonal patterns, too? Indeed, other planets, dwarf planets and moons in our solar system do have seasonal cycles — and they can look wildly different from the ones we ...