Asteroidea

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Asteroidea

a class of star-shaped ECHINODERMS which have a basic pentaradiate shape (a five-sided RADIAL SYMMETRY), e.g. starfish.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
According to CNEOS, the asteroid is currently traveling at a speed of 30,500 miles per hour.
There's an asteroid in an unstable orbit, 300 to 1,000 feet wide, big enough to decimate a large region of our planet.
These rovers will explore the asteroid, and provide additional contextual information for the returned samples.
Deep Space Industries and Planetary Resources are both US companies established with the specific purpose of exploiting asteroids.
It is thought that an asteroid or a comet was responsible for the blast.
"By identifying all the families in the main belt, we can figure out which asteroids have been formed by collisions and which might be some of the original members of the asteroid belt," said SwRI Astronomer Dr.
A chunk of asteroids that lands on the surface of the Earth becomes a meteorite.
The mission study for the Asteroid Geological Explorer project is led by the Royal Observatory of Belgium and includes participation by ISAE-SUPAERO (France), Antwerp Space (Belgium), Asteroid Initiatives LLC (USA) and EMXYS (Spain).
"Analysis of images taken of our solar system's main belt asteroids between Mars and Jupiter using the algorithm showed a 15 percent increase in positive identification of new asteroids," a NASA statement explained.
By contrast, Binzel found that asteroids that venture out of the main belt and pass close to Earth feel the effects of Earth's gravity, causing "asteroid quakes" that shift surface grains, exposing fresh grains underneath.
The first third of Dymock's book comprises a description of asteroids and dwarf planets, both as individuals and as groups.
On October 7, 2008, an asteroid the size of a car blazed through the atmosphere and crashed into the Nubian Desert in the African nation of Sudan.