The Sun By the Numbers - NASA Solar System Exploration
Oct 21, 2025 · 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 | Sun – NASA Solar System Exploration
Many stars are much larger – but the Sun is far more massive than our home planet: it would take more than 330,000 Earths to match the mass of the Sun, and it would take 1.3 million Earths …
In Depth | Our Solar System – NASA Solar System Exploration
Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as …
Jupiter - NASA Solar System Exploration
Sep 3, 2025 · Jupiter Jupiter is the fifth planet from the Sun, and the largest in the solar system, by far — more than twice as massive as the other planets combined.
In Depth | Kuiper Belt – NASA Solar System Exploration
Objects in these orbits interact strongly with the gravity of the giant planets. Because of these powerful gravitational encounters, most are fated to either be ejected from the solar system or …
In Depth | Earth's Moon – NASA Solar System Exploration
While you were there, you'd notice that the gravity on the surface of the Moon is one-sixth of Earth's, which is why in footage of moonwalks, astronauts appear to almost bounce across the …
Planet Compare - NASA Solar System Exploration
Oct 21, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
In Depth | Titan – NASA Solar System Exploration
Because Titan is less massive than Earth, its gravity doesn't hold onto its gaseous envelope as tightly, so the atmosphere extends to an altitude 10 times higher than Earth's—nearly 370 …
In Depth | Europa – NASA Solar System Exploration
One AU is the distance from Earth to the Sun. Light from the Sun takes about 45 minutes to reach Europa. Because of the distance, sunlight is about 25 times fainter at Jupiter and Europa than …
In Depth | Callisto – NASA Solar System Exploration
Jupiter and its moons orbit about 484 million miles (778 million kilometers) from our Sun. It takes the Jovian system—Jupiter and all of its moons—about 12 Earth years to complete one orbit …