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 …

The Sun is located in the Milky Way galaxy in a spiral arm called the Orion Spur that extends outward from the Sagittarius arm.

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 …

Our sun belongs to a spiral galaxy, the Milky Way, which is part of a cluster called “the Local Group,” The Milky Way and Andromeda galaxies appear to be the gravitational anchors of the …

2017年7月3日 · 3. Who named the rover? The name Sojourner was chosen after a year-long, worldwide competition in which students up to 18 years old were invited to write about a …

2000年12月14日 · "Sounds" of Outer Space Near Jupiter Now Online December 15, 2000 NASA's Cassini spacecraft, approaching Jupiter, is detecting waves in the thin gas of charged particles …

Although the space between stars in our galaxy appears to be completely empty of matter, there exists a very dilute gas even in “empty” space. This interstellar (meaning “between the stars”) …

NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

2025年1月9日 · The vertical structures and the shadows they cast also revealed wavy patterns in the parts of the rings that resemble a miniature Milky Way, giving scientists insight into the way …

2011年3月9日 · The latest evidence of the dominant role humans play in changing Earth's climate comes not from observations of Earth's ocean, atmosphere or land surface, but from deep …