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Asteroid - Wikipedia


Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbit...

Rocklike mass that revolves around the sun - Answers.com


There is a force called inertia. This means that all matter will keep moving forward until acted upon by an opposing force. Along with the gravity of the sun this ...

Solar System Facts: A Guide to Things Orbiting Our Sun - Space.com


Jan 22, 2016 ... The solar system is made up of the sun and everything that orbits ... about 10 times the mass of Earth and 5,000 times the mass of Pluto. ... Venus, Earth and Mars — are made up mostly of iron and rock. ... Nearly all their mass is made up of hydrogen and helium, giving them compositions like that of the sun.

Asteroid Belt: Facts & Formation - Space.com


Jun 11, 2012 ... Scattered in orbits around the sun are bits and pieces of rock left over ... or asteroids — meaning "star-like" — orbit between Mars and Jupiter in a ... Indeed, if the entire mass of the Main Belt could somehow create a single ...

The Sun and Stellar Structure - Astronomy Notes


Aug 18, 2011 ... If you use the percentage by mass, you find that hydrogen makes up ... The Sun's core is about 16 million K and has a density around 160 times the density of water. ... There is no molten rock like that found in the interior of the Earth. ... The solar equator rotates once every 25 days, while regions at 30° .....

Small Bodies - Asteroids, Comets and Asteroid Belts | PlanetsEdu.com


What does that look like? ... Comets form like 'dirty snowballs' in the Solar System from dust, rock fragments and ice ... These bodies travel around the Sun in elliptical orbits. They are usually of small mass and shaped like potatoes or peanuts.

Planetary Science - Astronomy Notes


Mar 25, 2013 ... How can you find out what the other planets are like by just observing ... we also have little chunks of rock, called meteorites, that give other clues. ... Charon is massive enough compared to Pluto that its mass cannot be ignored. ... Because of their elliptical orbits around the Sun, some oppositions are more .....

What Is an Orbit? | NASA


momentum: The mass of an object multiplied by its velocity. parallel: ... A dwarf planet is round and orbits the sun just like the eight major planets of the solar system. .... A rock dropped on Mars would fall more slowly than a rock falls on Earth.

Kepler-452b: Earth-ish planet around a Sun-ish star. - Slate


Jul 23, 2015 ... But this one is different: It orbits a star much more like the Sun. ... same stuff in it as Earth does, it'll be more massive; four times Earth's mass<sup>*</sup>. ... If it's less dense ( more rock) than, the surface gravity will be lower; if it's denser ...

Center of Mass, The Barycenter & Orbital Motion - Video & Lesson ...


Jan 26, 2015 ... This lesson will tell you what orbits around what, the sun around the ... In some cases, like a box or ball, the center of mass may actually be ...