In Depth | Earth – NASA Solar System Exploration
With a radius of 3,959 miles (6,371 kilometers), Earth is the biggest of the terrestrial planets and the fifth largest planet overall. From an average distance of 93 million miles (150 million …
In Depth | Mars – NASA Solar System Exploration
With a radius of 2,106 miles (3,390 kilometers), Mars is about half the size of Earth. If Earth were the size of a nickel, Mars would be about as big as a raspberry. From an average distance of …
In Depth | Earth's Moon – NASA Solar System Exploration
With a radius of about 1,080 miles (1,740 kilometers), the Moon is less than a third of the width of Earth. If Earth were the size of a nickel, the Moon would be about as big as a coffee bean. The …
Jupiter By the Numbers – NASA Solar System Exploration
May 7, 2024 · Earth. Jupiter is 11.0x larger than Earth. DATE OF DISCOVERY. Date object was discovered. Unknown. Unknown. DISCOVERED BY. Name of discoverer(s) Known by the …
Cosmic Distances - NASA Solar System Exploration
May 18, 2020 · One AU is the distance from the Sun to Earth's orbit, which is about 93 million miles (150 million kilometers). When measured in astronomical units, the 886,000,000-mile …
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 …
Measuring a Day – NASA Solar System Exploration
Nov 2, 2016 · A day on Mercury lasts about two Earth months. And a Mars day lasts 24.623 Earth hours, barely longer than Earth's. But watching surface features does not work equally well for …
Saturn By the Numbers – NASA Solar System Exploration
May 16, 2024 · square miles. km 2. km 2. square miles. km 2. SURFACE GRAVITY. The gravitational acceleration experienced at its surface at the equator. m/s 2. ft/s 2. m/s 2. m/s 2. …
Neptune By the Numbers – NASA Solar System Exploration
May 16, 2024 · Earth. Units of Measure: DATE OF DISCOVERY. Date object was discovered. Unknown. DISCOVERED BY. Name of discoverer(s) ... square miles. km 2. 510,064,472 km …
Cassini to Take Photo of Earth from Deep Space
Jun 17, 2013 · NASA's Cassini spacecraft, now exploring Saturn, will take a picture of our home planet from a distance of hundreds of millions of miles on July 19. NASA is inviting the public …