asteroid belt – Astronomy Now

Fastest-moving asteroid flies closer to Sun than Mercury

23 August 2021 Astronomy Now

Astronomers have found an asteroid, or possibly an extinct comet, in a high-stress orbit carrying it closer to the Sun than any other body in the solar system.

Dinosaur-killing impactor likely came from outer asteroid belt

9 August 2021 Astronomy Now

Modelling suggests the impactor believed to have triggered the mass extinction that wiped out the dinosaurs likely originated in the outer asteroid belt.

NASA’s Psyche mission passes key milestone on road to launch

5 February 2021 Astronomy Now

NASA’s Psyche probe passes a key milestone on the road to a trail-blazing mission to a metal-rich asteroid of the same name.

VLT images suggest fourth-largest asteroid may be a dwarf planet

29 October 2019 Astronomy Now

New observations of the asteroid Hygiea reveal a nearly spherical shape, indicating the body meets the basic qualifications for dwarf-planet status.

NASA’s Dawn mission gears up for close look at Ceres

20 October 2017 Stephen Clark

NASA’s Dawn spacecraft will remain at Ceres for the rest of its mission, heading closer to the asteroid belt’s largest resident than ever before to obtain new measurements of ice, salts and a tenuous intermittent atmosphere detected around the dwarf planet, the space agency announced Thursday.

Dawn mission managers await NASA decision on spacecraft’s future

17 June 2017 Stephen Clark

The future of NASA’s Dawn spacecraft, running low on hydrazine fuel and now flying around the dwarf planet Ceres without the help of internal pointing wheels, will be decided in the coming weeks by top space agency managers.

Discovery of binary-binary calls solar system formation into question

20 October 2016 Astronomy Now

University of Florida astronomers have discovered the first “binary-binary” — two massive companions around one star in a close binary system, one so-called giant planet and one brown dwarf, or “failed star.” For such large companion objects to be stable so close together defies our current popular theories on how solar systems form.

A view from Dawn’s low altitude swoop over Ceres

15 July 2016 Astronomy Now

This image from NASA’s Dawn spacecraft records an oblique look across Ceres towards the limb of the dwarf planet. The ion-propelled Dawn probe has been exploring Ceres, the largest body in the asteroid belt, since March 2015.

Take a colourful virtual flight over dwarf planet Ceres

29 January 2016 Astronomy Now

A new animation showing a simulated flight over the surface of dwarf planet Ceres using images from NASA’s Dawn spacecraft in its high-altitude mapping orbit has been produced by members of Dawn’s framing camera team at the German Aerospace Center, DLR. The movie emphasises the most prominent craters, such as Occator, and the tall, conical mountain Ahuna Mons.

NASA spacecraft nears historic arrival at dwarf planet Ceres

2 March 2015 Astronomy Now

NASA’s Dawn spacecraft has returned new images captured on approach to entering orbit around Ceres on Friday, March 6th — the first mission to successfully visit a dwarf planet.