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Getting to Know: Formation of Our Solar System
Getting to Know: Formation of Our Solar System

... these is the nebular theory, which claims that the ...
Background
Background

... ROCKS In other cases, the accumulation of large amounts of dead plant material may, over millions of years, turn into coal which is another type of sedimentary rock It may be that some dead sea creatures are not fragmented and become buried in their original condition. When this happens they can bec ...
UV Radiation in Different Stellar Systems
UV Radiation in Different Stellar Systems

... of Earth-like planets in stellar HZ is possible for the cases of 70 Vir and 51 Peg, even though they cannot be detected with the present telescopes. On the other hand, from theoretical dynamical considerations, they also found that the presence of Earth-like planets within the UV and optical HZ of G ...
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WORD - hrsbstaff.ednet.ns.ca
WORD - hrsbstaff.ednet.ns.ca

... 11. A band of the celestial sphere extending on either side of the ecliptic that represents the path of the different celestial bodies (i.e. Moon, Sun, planets) and contains constellations like Gemini and Aquarius is called the a. North Celestial Pole. b. South Celestial Pole. c. Celestial Equator. ...
Exploring the Asteroids
Exploring the Asteroids

... slightly more than the distance from Belfast to London) but about 460 km from pole to pole. Vesta has probably enjoyed a more eventful life than Ceres. In fact Vesta has had huge fragments splintered off itself. How do we know this? Astronomers can use a technique called reflection spectroscopy to i ...
The Sun`s Energy is Vital for Life on Earth
The Sun`s Energy is Vital for Life on Earth

... The sun's energy is the primary source of energy for all superficial occurrences and life on Earth. Combining with the Earth and the molecules that are held close by the Earth's gravitational force called the atmosphere, this energy provides the diversity of forms of life that are found on the Earth ...
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Final Review - PCHS SCIENCE
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Impact Cratering
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Our Changing Landforms
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4-night-sky - High Point University
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... planets circling the Sun, the Moon circling the Earth, etc., we only observe things from the Earth (or near the Earth in the case of space-based telescopes). • Our only reference frame for observation is that of the Earth (except for the few space probes, telescopes, etc.) • The positions of stars ( ...
Wolfson Inner Solar System
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... shape, and (c) has cleared the neighbourhood around its orbit. • (2) A dwarf planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that ...
PowerPoint Presentation - No Slide Title
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... planets circling the Sun, the Moon circling the Earth, etc., we only observe things from the Earth (or near the Earth in the case of space-based telescopes). • Our only reference frame for observation is that of the Earth (except for the few space probes, telescopes, etc.) • The positions of stars ( ...
Rotation and Revolution of the Earth-PPT
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... exactly in the ratio 1:2:4. This leads to resonant effects : The orbit of Io is perturbed by Europa and Callisto, because the moons regularly line up on one side of Jupiter. The gravitational pull of the outer moons is enough to produce a small eccentricity in the orbit of Io. This causes the tidal ...
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The Celestial Sphere

... Some solar eclipses are annular and others are total because the Moon’s orbit is elliptical. When the Moon eclipses the Sun at perigee (its closest point), it is just slightly larger than the disk of the Sun. When the Moon eclipses the Sun at apogee (its farthest point), it is just slightly smaller ...
Aliens
Aliens

... In space, no atmosphere to limit sensitivity, only limits are from instruments. The probability of an Earthlike planet at 1 AU transiting its star is 0.47%, or about 1 in 210 - assuming it had one. If 100% of stars observed had Earthlike terrestrial planets, Kepler would find about 480 of them. The ...
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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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