What are asteroids made of? Asteroids are made mostly of rock—with some composed of clay and silicate—and different metals, mostly nickel and iron. But other materials have been found in asteroids, as well.
Space Exploration
Sep 14, 2015
0
29
Where did the two natural satellites of Mars, Phobos and Deimos, come from? For a long time, their shape suggested that they were asteroids captured by Mars. However, the shape and course of their orbits contradict this hypothesis. ...
Space Exploration
Jul 4, 2016
22
2218
(Phys.org) -- With large swaths of oceans, rivers that snake for hundreds of miles, and behemoth glaciers near the north and south poles, Earth doesn't seem to have a water shortage. And yet, less than one percent of our ...
Astronomy
Jul 17, 2012
13
1
(Phys.org)—Astronomers have detected a brown dwarf orbiting HR 2562 – a nearby star known to host a debris disk. The newly discovered substellar companion is the first brown dwarf-mass object found to reside in the inner ...
An astronomical instrument at Subaru Telescope on Maunakea specifically designed to see planets around other stars has been successfully commissioned and has started to reveal stunning images of other worlds after almost ...
Astronomy
Feb 3, 2017
0
212
(Phys.org)—An international team of researchers reports the discovery of a series of concentric rings in the debris disk around a young nearby star known as HIP 73145. These unusual substructures could provide new details ...
A new NASA supercomputer simulation of the planet and debris disk around the nearby star Beta Pictoris reveals that the planet's motion drives spiral waves throughout the disk, a phenomenon that causes collisions among the ...
Astronomy
Jun 25, 2015
2
87
Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) found a young star surrounded by an astonishing mass of gas. The star, called 49 Ceti, is 40 million years old and conventional theories of planet ...
Astronomy
Dec 23, 2019
10
262
(Phys.org) —The nearby star system Fomalhaut – of special interest for its unusual exoplanet and dusty debris disk – has been discovered to be not just a double star, as astronomers had thought, but one of the widest ...
Astronomy
Oct 3, 2013
2
0
By examining the atomic carbon line from two young star systems—49 Ceti and Beta Pictoris—researchers had found atomic carbon in the disk, the first time this observation has been made at sub-millimeter wavelength, hinting ...
Astronomy
Apr 12, 2017
1
276
