In Depth | Asteroids - NASA Solar System Exploration
Most of this ancient space rubble can be found orbiting our Sun between Mars and Jupiter within the main asteroid belt. Asteroids range in size from Vesta – the largest at about 329 miles (530 …
Asteroids, Comets & Meteors - NASA Solar System Exploration
Don’t let the name fool you. Our solar system’s small bodies – asteroids, comets, and meteors – pack big surprises. These chunks of rock, ice, and metal are leftovers from the formation of …
In Depth | Oumuamua – NASA Solar System Exploration
The object, named ‘Oumuamua by its discoverers, is up to one-quarter mile (400 meters) long and highly-elongated—perhaps 10 times as long as it is wide. That aspect ratio is greater than that …
In Depth | Perseids – NASA Solar System Exploration
About the Meteor Shower. The Perseid meteor shower, which peaks in mid-August, is considered the best meteor shower of the year. With swift and bright meteors, Perseids frequently leave …
In Depth | Ceres – NASA Solar System Exploration
Dwarf planet Ceres is the largest object in the asteroid belt between Mars and Jupiter, and it's the only dwarf planet located in the inner solar system. It was the first member of the asteroid belt …
NASA, FEMA, International Partners Plan Asteroid Impact Exercise
2019年4月24日 · Scientists on the ground now know that the asteroid is headed towards New York City. The small asteroid will enter Earth's atmosphere at 19 km/s (43,000 mph) on April …
10 Ways OSIRIS-REx is Advancing the Asteroid Frontier
2019年4月3日 · OSIRIS-REx is the first mission to visit a B-type asteroid. In addition, the sample that returns to Earth in 2023 will be our first chance to put pristine material from this type of …
Pluto, Eris, and the asteroid Ceres in this category. Subsequent discoveries added Haumea and Makemake to the dwarf planet family. Pluto, Eris, Haumea, and Makemake retain their classifi …
NASA's Dawn Mission to Asteroid Belt Comes to End
2018年11月1日 · The Dawn spacecraft launched 11 years ago to visit the two largest objects in the main asteroid belt. Currently, it's in orbit around the dwarf planet Ceres, where it will …
Ceres: Keeping Well-Guarded Secrets for 215 Years
2016年1月26日 · Herschel coined the term "asteroid" because of their star-like appearance in telescopes. Today, we know there are hundreds of thousands of asteroids in the main asteroid …