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Asteroid Gaspra - Solar System

Gaspra is an irregular body with dimensions of about 20 x 12 x 11 km (12.5 x 7.5 x 7 miles). Its surface reflects approximately 20 percent of the sunlight striking it. Gaspra is classified as an S-type asteroid and is likely composed of metal-rich silicates and perhaps blocks of …

In Depth | 4 Vesta – NASA Solar System Exploration

Dec 19, 2019· Vesta is believed to have lost about one percent of its mass less than a billion years ago in a massive collision responsible for the Rheasilvia crater, which is about 310 miles (500 kilometers) wide—some 95 percent of the asteroid's mean diameter. The Vesta family of asteroids is probably debris from this collision.

Asteroid Belt: Facts & Formation | Space

May 05, 2017· Asteroid Belt: Facts & Formation. Orbits of inner planets are shown as large circles in this computer-generated snapshot of actual known objects as of July 20, 2002. Green dots represent asteroids ...

Facts on Asteroids

Nov 27, 2007· Facts on Asteroids. Asteroids are rocky and metallic objects that orbit the Sun but are too small to be considered planets. They are known as minor planets. Asteroids range in size from Ceres, which has a diameter of about 1000 km, down to the size of pebbles. Sixteen asteroids have a diameter of 240 km or greater.

Asteroid - Wikipedia

There is increasing interest in identifying asteroids whose orbits cross Earth's, and that could, given enough time, collide with Earth (see Earth-crosser asteroids).The three most important groups of near-Earth asteroids are the Apollos, Amors, and Atens.Various asteroid deflection strategies have been proposed, as early as the 1960s.. The near-Earth asteroid 433 Eros had been discovered as ...

Asteroids Facts | Types, Location, How Many?, History ...

Sep 25, 2019· Interesting Facts about Asteroids. The size of asteroids varies from the size of a speck of dust to the size of 945 kilometers (587 miles) in diameter! This is the dwarf planet Ceres – the largest discovered asteroid in the solar system. Most of the asteroids orbit the …

What is the asteroid belt? | Cool Cosmos

The asteroid belt is a region of space between the orbits of Mars and Jupiter where most of the asteroids in our Solar System are found orbiting the Sun. The asteroid belt probably contains millions of asteroids. Astronomers think that the asteroid belt is made up of material that was never able to form into a planet, or of the remains of a ...

Asteroid Facts for Kids - Interesting Facts about Asteroids

The Hubble Space Telescope used ground-based radar for observations of asteroids. Facts about Asteroids for Kids: Ceres was the first asteroid discovered and is classified as a protoplanet. It's the largest known asteroid at 580 mi/933 km across. The smallest known asteroid is 1991 BA and is …

Asteroid Introduction - Solar System

Before 1991 the only information obtained on asteroids was though Earth based observations. Then on October 1991 asteroid 951 Gaspra was visited by the Galileo spacecraft and became the first asteroid to have hi-resolution images taken of it. Again on August 1993 Galileo made a close encounter with asteroid 243 Ida. This was the second asteroid ...

Comets, meteors, and asteroids

Jan 14, 2011· This is the largest asteroid to date at 485 miles long. Asteroids are the rocky remains of the formation of our solar system from 4.6 billion years ago. Most asteroids orbit the sun and are found in the asteroid belt between Mars and Jupiter. 8. Asteroids Continued They can range from hundreds of feet to hundreds of miles in diameter.

Asteroids: Fun Facts and Information About Asteroids

Asteroids: Fun Facts and Information About Asteroids Asteroids are small, airless rocky worlds that revolve around the sun and are too small to be called planets. They are also called space rocks, planetoids or minor planets.

Overview | Asteroids – NASA Solar System Exploration

Mar 28, 2019· Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system about 4.6 billion years ago. . Most of this ancient space rubble can be found orbiting the Sun between Mars and Jupiter within the main asteroid belt. Asteroids range in size from Vesta — the largest at about 329 miles ...

Asteroid Watch - NASA

Jun 11, 2021· Asteroid Watch. JPL manages NASA's Center for Near-Earth Object Studies, which tracks comets and asteroids that drift close to Earth's orbital neighborhood. A Near-Earth Object (NEO) is generally defined as an asteroid or comet that approaches our planet less than 1.3 times the distance from Earth to the Sun (the Earth-Sun distance is about 93 ...

Ten Things to Know About Bennu

Oct 16, 2020· Rubble-pile asteroids like Bennu are celestial bodies made from lots of pieces of rocky debris that gravity compressed together. This kind of detritus is produced when an impact shatters a much larger body (for Bennu, it was a parent asteroid around 60 miles [about 100 km] wide). Bennu, for contrast, is about as tall as the Empire State Building.

Asteroid Belt Facts - Solar System Facts

The asteroid belt is situated between the orbits of Mars and Jupiter around 280 million miles (450 million km) from the sun. There are millions of asteroids residing in this area ranging from 600 miles (950 km) in diameter, all the way down to particles of dust. It is believed asteroids are the remnants from the formation of the planets.

Asteroids and Comets - NASA

Jun 11, 2021· An asteroid is mostly rock and dust, with some ice in the mix, while a comet is mostly ice, with some rock and dust. A comet also sports a tail that's visible very occasionally in the night sky. As primitive solar system objects, comets and asteroids help us unlock the history that led to the formation of the planets and eventually, life on Earth.

Asteroid Fast Facts | NASA

Mar 31, 2014· Asteroid: A relatively small, inactive, rocky body orbiting the Sun. Comet: A relatively small, at times active, object whose ices can vaporize in sunlight forming an atmosphere (coma) of dust and gas and, sometimes, a tail of dust and/or gas. Meteoroid: A small particle from a comet or asteroid …

Asteroids -

Asteroids were first studied in depth by the Galileo spacecraft on its way to Jupiter. This mission revealed that the asteroids Ida and Gaspra are small bodies with irregular shapes and heavily cratered surfaces. The NEAR spacecraft was a project designated to study the asteroid Eros, which is one of the largest asteroids that comes close to the Earth.


Earth asteroid called Eros. NEAR will send back pictures of the asteroid and information that will tell us what the asteroid is made of, how big it is, what the surface is like and much more! To learn more about the NEAR mission and asteroids, explore the games and Dr. NEARsighted's activities in this book! D

Asteroids - General - Crater Mistᴮᴱᵀᴬ

Asteroids Fun Facts: More than 100 tons of material from asteroids or comets fall to Earth each day. Most of them burn up in Earth's atmosphere. Every 2000 years or so a football field sized asteroid falls to Earth and causes colossal damage to that area. Asteroids have …

Asteroid 4179 Toutatis - NASA

Asteroid 4179 Toutatis. Asteroid 4179 Toutatis (formerly 1989 AC) was discovered by C. Pollas on January 4, 1989, at Caussols, France, on photographic plates taken on the 0.9-m Schmidt telescope by Alain Maury and Derral Mulholland during astrometric …

Asteroid Facts, Worksheets, Discovery, Formation ...

Asteroids are irregularly shaped objects ranging in size from a few meters to hundreds of kilometers across. Most are located in the asteroid belt between Mars and Jupiter, but some stray closer, becoming near-Earth asteroids if they get within 1.3 astronomical units of the Sun (the Earth's average distance to the Sun is 1 AU).

Asteroid Facts - Interesting Facts about Asteroids

Facts about Asteroids. Asteroids are clues to the formation of the rocky planets of our solar system. The objects we see today are leftover from a time when the solar system formed 4.5 billion years ago. There are a LOT of these leftovers out there. Let's learn some cool facts about them. Asteroids aren't the only things that hit Earth.