In Depth | Sun – NASA Solar System Exploration
The Sun is located in the Milky Way galaxy in a spiral arm called the Orion Spur that extends outward from the Sagittarius arm.
In Depth | Our Solar System – NASA Solar System Exploration
The planetary system we call home is located in an outer spiral arm of the Milky Way galaxy. 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 Pluto; dozens of moons; and millions of asteroids, comets, and ...
least twice as much mass in the Milky Way galactic disk as can be accounted for by adding up the mass of all stars and interstellar clouds. While the solar system does not have any detectable evidence for dark matter, our galaxy is composed of perhaps 90% dark matter.
What is a Planet? | Planets – NASA Solar System Exploration
Researchers have found hundreds of extrasolar planets, or exoplanets, that reside outside our solar system; there may be billions of exoplanets in the Milky Way Galaxy alone, and some may be habitable (have conditions favorable to life).
Galleries | Galileo – NASA Solar System Exploration
2018年7月11日 · Galileo sparked the birth of modern astronomy with his observations of the Moon, phases of Venus, moons around Jupiter, sunspots, and the news that seemingly countless individual stars make up the Milky Way Galaxy.
Cassini Sees Saturn Rings Oscillate Like Mini-Galaxy – NASA Solar ...
2010年10月31日 · Scientists believe they finally understand why one of the most dynamic regions in Saturn's rings has such an irregular and varying shape, thanks to images captured by NASA's Cassini spacecraft.
Search Results – NASA Solar System Exploration
NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
Raw Images – NASA Solar System Exploration
2023年9月21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. Cassini Raw Images
In Depth | Pluto – NASA Solar System Exploration
NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.
Events | Solar System Ambassadors - NASA Solar System Exploration
2023年5月18日 · The NASA Solar System Ambassadors program is a public engagement effort that works with motivated volunteers across the nation to communicate the science and excitement of NASA's space exploration missions and …