inner planets


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inner planets

The terrestrial planets Mercury, Venus, Earth, and Mars, which lie closer to the Sun than the main asteroid belt.
References in periodicals archive ?
In contrast, massive outer planets with elongated orbits act like gravitational slingshots that are likely to eject an inner planet that's on an Earthlike path, notes Hugh R.
Attributing water on Earth to these latecomer comets neatly explains a couple of things: first, how water that originated at the outer edges of the solar system got to at least one of its inner planets, and second, how water arrived late enough in Earth's formation for the planet to have sufficient gravity to retain it.
The inner planet previously found by Marcy and Butler is at least 2.
Although these escape hatches are numerous, they're extremely narrow, making it difficult to explain how so many asteroid fragments end up pelting the inner planets.
Supporting the theory is the fact that carbon abundance in the asteroid belt surrounding the inner planets increases the farther away you get from the sun.
Wetherill of the Carnegie Institution showed that giant Jupiter, in its lonely outpost five times as far from the sun as Earth is, protects the inner planets from bombardment by comets.
London, June 11 (ANI: A new analysis of craters of the Moon has suggested that the shattered remnants of a dwarf planet may have bombarded the inner planets in the early solar system.
During this epoch, known as the late heavy bombardment, comets pelted Earth and the other inner planets at a far higher rate than they do today.
O'Toole said that previous research has suggested the outer planets could affect the orbits of the inner planets through the influence of gravity.
The giant planet's pull can dramatically elongate the orbits of these asteroids, causing their paths to cross those of the inner planets.
Impact evidence from lunar samples, meteorites and the pockmarked surfaces of the inner planets paints a picture of a violent environment in the solar system during the Hadean Eon 4.
The inner part of the disk, which lies between the star and the planet, spins faster than the outer part, just as the inner planets in the solar system revolve around the sun faster than the outer ones.