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Bookmark or Share- In Depth | Earth's Moon – NASA Solar System ExplorationThe Moon makes a complete orbit around Earth in 27 Earth days and rotates or spins at that same rate, or in that same amount of time. Because Earth is moving as well – rotating on its axis as it orbits the Sun – from our perspective, the Moon appears to orbit us every 29 days.
- RPS 3D Viewer - NASA Solar System ExplorationNASA’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 | Mercury – NASA Solar System ExplorationThe smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon. From the surface of Mercury, the Sun would appear more than three times as large as it does when viewed from Earth, and the sunlight would be as much as seven times brighter. Mercury's surface temperatures are both extremely hot ...
- In Depth | Saturn – NASA Solar System ExplorationSaturn has 83 moons. Sixty-three moons are confirmed and named, and another 20 moons are awaiting confirmation of discovery and official naming by the International Astronomical Union (IAU). This Cassini image from 2012 shows Titan and its host planet Saturn. Image Credit: NASA/JPL-Caltech/SSI.
- In Depth | Moons – NASA Solar System ExplorationTitan, the second largest in the solar system, is the only moon with a thick atmosphere. In the realm of the ice giants, Uranus's inner moons appear to be about half water ice and half rock. Miranda is the most unusual; its chopped-up appearance shows the scars of impacts of large rocky bodies.
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