NASA’s Dawn spacecraft has gone silent - All About Space
In 2011, when Dawn arrived at Vesta, the second largest world in the main asteroid belt, the spacecraft became the first to orbit a body in the region between Mars and Jupiter. In 2015, when Dawn went into orbit around Ceres, a dwarf planet that is also the largest world in the asteroid belt, the mission became the first to visit a dwarf planet ...
An impact crater on Earth can be traced back to the asteroid belt ...
2019年3月18日 · The meteorites reflect light much like asteroid Vesta and its family of Vestoids. 525-kilometre (326-mile) Vesta is the second largest body in the asteroid belt. The 0.8 to eight kilometre (0.5 mile to five mile) sized Vestoids are fragments from a massive collision that created the Rheasilvia impact basin on Vesta.
‘Pebble-formation’ likely to explain Mars’ small size, study finds
For example, an object the size of Ceres (about 600 miles across), which is the largest asteroid in the asteroid belt, would have grown very quickly near the current location of the Earth. But it would not have been able to grow effectively near the current location of Mars, or beyond, because aerodynamic drag is too weak for pebble capture to ...
Ceres’ organic material most likely made by dwarf planet
2017年10月20日 · The SwRI have investigated the possibility of a comet or an asteroid transporting the organics, but the results point towards the substance being most likely native to the dwarf planet. “The discovery of a locally high concentration of organics close to the Ernutet crater poses an interesting conundrum,” says Dr. Simone Marchi, a principal ...
Vesta - spaceanswers.com
An impact crater on Earth can be traced back to the asteroid belt object Vesta.
collision - spaceanswers.com
Astronomers have deduced from a meteorite that the second largest asteroid in the Asteroid Belt was part of a tremendous collision
New Saturn-mass exoplanet discovered around a pair of stars
The planet orbits roughly 300 million miles from the stellar duo, about the distance from the asteroid belt to our Sun. It completes an orbit around both stars roughly every seven years. The two red dwarf stars are a mere 7 million miles apart, …
Most common ‘outer planets’ probably like Neptune - All About …
2016年12月16日 · A new statistical study of planets found by a technique called gravitational microlensing suggests that Neptune-mass worlds are likely the most common type of planet to form in the icy outer realms of planetary systems.
Astronomers get best image yet of red supergiant’s surface and ...
Astronomers have created the first detailed image that shows the true nature of the surface of Antares, producing the first-ever map of the red supergiant’s atmosphere. The gaseous envelope of Antares, which would extend further than the Asteroid Belt if it were placed in our Solar System, has shown to experience unexpected turbulence.
Citizen scientist discovers unusual ancient white dwarf star
2019年2月20日 · An asteroid (bottom left) breaks apart under the powerful gravity of LSPM J0207+3331, the oldest, coldest white dwarf known to be surrounded by a ring of dusty debris. Image credit: NASA’s Goddard Space Flight Center/Scott Wiessinger