Today, we know of more than 5,000 exoplanets: planets outside our solar system that orbit other stars. While the effort to ...

Through observations, either with space telescopes or with ground-based equipment, we can find out how planets in our solar system and beyond are structured, what materials they are made of, whether ...

Five major planets in our solar system are lined up in a row for a rare planetary conjunction visible with the naked eye. In a clear sky, Mercury, Venus, Mars, Jupiter, and Saturn can be seen ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

We’re showing that, everywhere we look now, there was some sort of magnetic field that was responsible for bringing mass to ...

Pluto. Due to its large mass, it would have a great internal energy that could sustain, for example, subsurface oceans. Its orbit would be very distant, much beyond Neptune, and much more inclined ...

There may be an undiscovered planet in the outer solar system whose presence is revealed by the strange orbit of objects beyond the eighth planet Neptune. The tantalizing prospect of a ninth ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

Everyone knows about the Solar System, and the planets that make it up. They’re in space, orbiting the Sun, in an order we all at least used to be able to recite. But it was not always so.

In fact, every planet—and every moon—in the solar system will be in the sky during the eclipse. However, that doesn’t mean you’ll see them all. Contrary to what you might have read ...

Researchers have developed a new method using the Allen Telescope Array to search for interplanetary radio communication in the TRAPPIST-1 star system. A new technique allows astronomers to home ...