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Astronomy Unit – Part 3: The Planets Terrestrial Planet – the four
Astronomy Unit – Part 3: The Planets Terrestrial Planet – the four

... Terrestrial Planet – the four small, dense, rocky planets that orbit closest to the sun Astronomical Unit (AU) – the average distance between the sun and the Earth, or 150 million km. Prograde Rotation – counterclockwise spin of a planet. Retrograde Rotation – the clockwise spin of a planet. (Venus) ...
A Quick Tour of the Solar System
A Quick Tour of the Solar System

... would have been covered with frozen water, and life might not have developed. ...
Solar System Formation
Solar System Formation

... • Planets are now stuck with what they’ve got ...
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File

... methane mixed with rocky or metallic solids • 1-100 km in diameter • When comets get near the sun, their ices turn to gas • Some solids are released forming spectacular tails visible in the Earth’s sky • Comet Close Approach to Mars: October 19, 2014 ...
Chapter 27 Study Notes
Chapter 27 Study Notes

... Small bodies from which planets originated during the early ______ of the solar system are called ___________. ...
Solar System Bodies PPT
Solar System Bodies PPT

Review: sun spots and solar flares inner and outer planets what
Review: sun spots and solar flares inner and outer planets what

... ­ dirty snowballs composed of ice, rock and gas ...
Asteroid Belt Bode`s Law It was thought that the sequence of planets
Asteroid Belt Bode`s Law It was thought that the sequence of planets

... It was thought that the sequence of planets and distances had a pattern. Taking Mercury as 4 and adding 4 to the geometrical series 3, 6, 12, 24 etc gives the approximate distances of the planets unto Uranus. Beyond this the relationship breaks down and the sequence is probably a coincidence. Howeve ...
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Introduction to Astronomy

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Chapter 19

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Solar System Review

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The AMAZING Solar System! Today Our Solar System Consists of …

... measure distances in the solar system. It is the average distance from the earth to the sun, about 150 million kilometers (93 million miles) In 2006, the “International Astronomical Union” (IAU) met in Europe and created a new class of heavenly body, the dwarf planet. It included three objects in th ...
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Other objects in space guided notes

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... • Up to 2500 km (1,553 miles) across • Most formed by meteorite impact on the Moon • Some formed by volcanic action inside the Moon ...
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unit 8 vocabulary

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Chapter 1 – Nebular hypothesis, rotation vs

... compared to the Earth. What’s an AU? Know location of asteroid belt, Kuiper Belt/Trans Neptunian Objects, Oort Cloud (50-100K AU) Article on impact of Moon’s size on Earth system – main points Articles on new planet around Gliese; on Eris; on watching the night sky Nebular Hypothesis with pictures a ...
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First Quarter Science EQT Jeopardy

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... • Very heavy elements are unstable – they decay. • The decay process generates radiation. ...
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These are the four largest moons of Jupiter

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This presentation

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Halley`s comet

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Minor Bodies of the Solar System

... out equal areas in equal times ...
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Solar System Study Guide

... Earth—the only known location of life in the solar system Moon—a natural satellite that orbits a planet Solar System—a sun and all the objects that move around it Orbit—the path that one object in space takes around another object in space Gravity—the force that pulls objects toward each other Aster ...
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Late Heavy Bombardment



The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, corresponding to the Neohadean and Eoarchean eras on Earth. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets in the inner Solar System, including Mercury, Venus, Earth, and Mars. The LHB happened after the Earth and other rocky planets had formed and accreted most of their mass, but still quite early in Earth's history.Evidence for the LHB derives from lunar samples brought back by the Apollo astronauts. Isotopic dating of Moon rocks implies that most impact melts occurred in a rather narrow interval of time. Several hypotheses are now offered to explain the apparent spike in the flux of impactors (i.e. asteroids and comets) in the inner Solar System, but no consensus yet exists. The Nice model is popular among planetary scientists; it postulates that the gas giant planets underwent orbital migration and scattered objects in the asteroid and/or Kuiper belts into eccentric orbits, and thereby into the path of the terrestrial planets. Other researchers argue that the lunar sample data do not require a cataclysmic cratering event near 3.9 Ga, and that the apparent clustering of impact melt ages near this time is an artifact of sampling materials retrieved from a single large impact basin. They also note that the rate of impact cratering could be significantly different between the outer and inner zones of the Solar System.
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