Solar System Exploration - NASA Science
The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1.3 million asteroids, and about 3,900 comets.
Solar System Facts - Science@NASA
Our solar system includes the Sun, eight planets, five officially named dwarf planets, and hundreds of moons, and thousands of asteroids and comets. Our solar system is located in the Milky Way, a barred spiral galaxy with two major arms, and two minor arms.
Our Solar System - NASA Science
2016年3月15日 · Our solar system is made up of a star—the Sun—eight planets, 146 moons, a bunch of comets, asteroids and space rocks, ice, and several dwarf planets, such as Pluto. The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Our Sun: Facts - Science@NASA
The Sun doesn’t have moons, but it’s orbited by eight planets, at least five dwarf planets, tens of thousands of asteroids, and perhaps three trillion comets and icy bodies. Several spacecraft are currently investigating the Sun including Parker Solar Probe, STEREO, Solar Orbiter, SOHO, Solar Dynamics Observatory, Hinode, IRIS, and Wind.
The Sun - Science@NASA
The connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, climate, radiation belts and auroras. Though it is special to us, there are billions of stars like our Sun scattered across the Milky Way galaxy.
Planetary Systems - NASA Science
Our solar system consists of the Sun, whose gravity keeps everything from flying apart, eight planets, hundreds of moons, and billions of smaller bodies – from comets and asteroids to meteoroids and tiny bits of ice and rock.
Earth's Moon - Science@NASA
Observers on Earth can track the Moon's motion in space (relative to Earth and the Sun) through moon phases, supermoons and eclipses.
Skywatching - NASA Science
Your own eyes will show you stars, a handful of bright planets, the Moon, comets and meteors (shooting stars), to name a few sights. Binoculars or a small telescope enable you to see finer details than your eyes can detect, making visible things like the large moons of Jupiter and the rings of Saturn, as well as star clusters and double stars.
Moon Facts - Science@NASA
The 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.
Galileo’s Observations of the Moon, Jupiter, Venus and the Sun
2009年2月24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.