April 25, 2024

Astronomy & Astrophysics 101: Asteroids

Animation of an asteroid turning in space.
Asteroids are rocky heavenly bodies that orbit the Sun, however do not fulfill the requirements to be categorized as a planet.
The asteroid belt is an area of space between the orbits of Mars and Jupiter that is largely occupied with asteroids. The majority of recognized asteroids are discovered within the asteroid belt. Comets and asteroids are partially distinguished from one another by their composition: asteroids are rocky, whereas comets comprise dust and ice.
The asteroid 6478 Gault is seen with the NASA/ESA Hubble Space Telescope, showing 2 narrow, comet-like tails of debris that tell us that the asteroid is slowly going through self-destruction. The brilliant streaks surrounding the asteroid are background stars. The Gault asteroid is located in between the orbits of Mars and Jupiter. Credit: NASA, ESA, K. Meech and J. Kleyna, O. Hainaut
Hubble has actually observed different asteroids throughout more than three decades of observations. For example, in 2017 Hubble studied the asteroid Vesta– which is just 500 km in diameter– from a distance of 250 million kilometers. The observations developed a map of its surface area and were even able to capture the asteroids altering look as it rotated.

The asteroid belt is an area of area in between the orbits of Mars and Jupiter that is largely populated with asteroids. Asteroids and comets are partly distinguished from one another by their composition: asteroids are rocky, whereas comets comprise dust and ice. The asteroid 6478 Gault is seen with the NASA/ESA Hubble Space Telescope, showing 2 narrow, comet-like tails of particles that inform us that the asteroid is gradually undergoing self-destruction. In 2017 a German-led group of astronomers utilized Hubble to observe 2 asteroids, orbiting each other in the asteroid belt between Mars and Jupiter, that showed comet-like functions, consisting of a long tail and a brilliant coma. The images offered new insights into the asteroids past: the object was 4– 9 kilometers wide and had 2 narrow, comet-like tails of debris that suggested that the asteroid was gradually undergoing self-destruction.

Hubble likewise observed the incredible asteroid crash P2010/A2 in 2010. Using Hubble to study the aftermath of the crash over five months, astronomers saw a strange, comet-like debris path gradually progress as the crash site orbited the Sun. This research provided hints about how asteroids act when they clash, and how the fall-out from these impacts adds to the dust that pervades the Solar System.
Asteroids are rocky celestial bodies that orbit the Sun, however do not fulfill the requirements to be categorized as a planet. Credit: NASA & & ESA
In 2017 a German-led group of astronomers used Hubble to observe two asteroids, orbiting each other in the asteroid belt in between Mars and Jupiter, that displayed comet-like functions, including a long tail and an intense coma. It was Hubbles images that revealed that it was in fact not a single object, but 2 asteroids of almost the exact same mass and size, orbiting each other at a range of about 100 kilometers.
Credit: ESA/Hubble, NASA, ESA, K. Meech and J. Kleyna (University of Hawaii), O. Hainaut (European Southern Observatory).
In 2019, Hubble observed a rare self-destructing asteroid called 6478 Gault. The images offered brand-new insights into the asteroids past: the item was 4– 9 kilometers broad and had two narrow, comet-like tails of particles that showed that the asteroid was gradually going through self-destruction. Each tail is evidence of an active event that released material into area. The direct observation of this activity by the Hubble Space Telescope offered astronomers with an unique chance to study the composition of asteroids. By researching the product that this unstable asteroid releases into space, astronomers can get a glance into the history of planet formation in the early Solar System.