asteroid (planetoid)

asteroid (planetoid)

Also called planetoids or minor planets, the asteroids are tiny planets most of which orbit the Sun between Mars and Jupiter. The largest - and the first discovered - is Ceres, with a diameter of 1,003 km. It is estimated that there may altogether be no fewer than 40000. A few have very elliptical orbits and cross the orbits of several other (major) planets. One or two even have their own satellites (moons.)

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Part of Speech: noun
Synonym(s): atmosphere_₁₀
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Industry/Domain: Astronomy
Category: General astronomy
Company: Caltech
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asteroid

Astronomy; Planetary science

A small, mostly rocky body orbiting the Sun. Asteroids range in size from 1000 kilometers in diameter to tiny objects you could hold in your hand. Most asteroids orbit the Sun ...

Apolo asteroid

Astronomy; General astronomy

One of a small group of asteroids whose orbits intersect that of Earth. They are named for the prototype, Apollo.

aktinoidi

Astronomy; General astronomy

Elementi sa atomskim brojevima od 89 (Aktinij) i 103

aktinijum

Astronomy; General astronomy

Mekan, srebrno-beli radioaktivni metal koji sija u mraku

akivna optika

Astronomy; General astronomy

Controlling the shape of a telescope mirror at a relatively slow rate.

adaptivna optika

Astronomy; General astronomy

Compensating for atmospheric distortions in a wavefront by high-speed changes in the shape of a small, thin mirror.

americijum

Astronomy; General astronomy

radioactive silvery metal which does not occur naturally

jedinica ubrzanja

Astronomy; General astronomy

A unit for measuring acceleration, which is metre per second squared.

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