In Depth | Venus – NASA Solar System Exploration
The planet is nearly as big around as Earth – 7,521 miles (12,104 kilometers) across, versus 7,926 miles (12,756 kilometers) for Earth. From Earth, Venus is the brightest object in the …
In Depth | Earth's Moon – NASA Solar System Exploration
The brightest and largest object in our night sky, the Moon makes Earth a more livable planet by moderating our home planet's wobble on its axis, leading to a relatively stable climate. It also …
The Sun By the Numbers – NASA Solar System Exploration
2025年1月9日 · The Sun is the star at the heart of our solar system. Its gravity holds the solar system together, keeping everything – from the biggest planets to the smallest bits of debris – …
In Depth | Saturn – NASA Solar System Exploration
The farthest planet from Earth discovered by the unaided human eye, Saturn has been known since ancient times. The planet is named for the Roman god of agriculture and wealth, who …
Jupiter By the Numbers – NASA Solar System Exploration
2024年5月7日 · Earth. Units of Measure: DATE OF DISCOVERY. Date object was discovered. Unknown. DISCOVERED BY. Name of discoverer(s) Known by the Ancients. AVERAGE …
In Depth | Pluto – NASA Solar System Exploration
With a radius of 715 miles (1,151 kilometers), Pluto is about 1/6 the width of Earth. If Earth was the size of a nickel, Pluto would be about as big as a popcorn kernel. From an average …
Planet Compare - NASA Solar System Exploration
2025年1月9日 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
What is a Planet? | Planets – NASA Solar System Exploration
Everyone knows that Earth, Mars and Jupiter are planets. But both Pluto and Ceres were once considered planets until new discoveries triggered scientific debate about how to best describe …
By the Numbers | Earth's Moon – NASA Solar System Exploration
Twelve of the 24 men who traveled from Earth to the Moon walked on its surface. The first, and most famous, was Neil Armstrong in 1969. The last man on the Moon – to date – was Gene …
Overview | The Grand Finale - NASA Solar System Exploration
Cassini’s final images were sent to Earth several hours before its final plunge, but even as the spacecraft made its fateful dive into the planet's atmosphere, it was sending home new data in …