New measurements have revealed that Jupiter — the largest planet in our solar system — is actually smaller and more flattened ...

Astronomers using NASA’s Hubble Space Telescope have measured the rotation rate of an extreme exoplanet by observing the varied brightness in its atmosphere. This is the first measurement of the ...

There’s always something new happening on Jupiter. The Solar System’s largest planet is home to a high-speed, 3,000-mile-wide jet stream, pulsing near its equator. Scientists made this discovery using ...

Astronomers have captured the first-ever spin measurements of HR 8799, the famed system that made history as the very first exoplanetary system to have its image taken. Discovered in 2008 by two ...

The giant planet Jupiter, in all its banded glory, is revisited by NASA's Hubble Space Telescope in these latest images, taken on January 5-6, 2024, capturing both sides of the planet. Hubble monitors ...

A planet's year length depends on its distance from the Sun. Planets closer to the Sun have shorter years. A planet's rotation speed is unrelated to its year length. Planets' orbital speeds vary ...