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Six Earths fit lined up side by side in
Six Earths fit lined up side by side in

... It takes Jupiter 11.86 years to orbit the sun Jupiter's average temperature is -108 degrees C. Jupiter was first found in 7th or 8th century by Babylonian astronomers Jupiter is the fourth brightest object in the solar system The Sun, Moon and Venus are brighter Jupiter has the shortest day of all p ...
Slide 1
Slide 1

... Distances in Space Distances in space are so large that well-known units such as kilometres are almost meaningless. ...
Introduction to Lookback
Introduction to Lookback

... Jupiter and Pluto, as well as spacecraft that are well beyond Pluto. Lookback Introductory Activity 4-7-12.docx ...
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the brochure

... bucket of water. The fascinating ring system observed by Galileo in 1610 is only beginning to be understood. First thought to be moons of Saturn, it is now known that the rings comprise trillions of ice and rock chunks ranging in size from dust particles to the size of a small car. ...
early astronomical history
early astronomical history

... – Ptolemy of Alexandria improved the geocentric model by assuming each planet moved on a small circle, which in turn had its center move on a much larger circle centered on the Earth – The small circles were called epicycles and were incorporated so as to explain retrograde motion – Ptolemy’s model ...
Objects in the Universe
Objects in the Universe

... • (a) has sufficient mass for its self-gravity assumes a nearly round shape, and • (b) is in orbit around a star, and is neither a star nor a satellite of a planet, and • (c) has cleared the neighborhood around its orbit • Is pluto a planet then? ...
Beyond Pluto
Beyond Pluto

... The inner solar system spans everything from the sun out to (but not including) Jupiter, 460 million miles away. The solar system as a whole formed roughly 4.5 billion years ago from a collapsing disk of dust and gas. Swarms of boulder-size objects called planetesimals slowly accreted to form the ro ...
Seminar topics - Studentportalen
Seminar topics - Studentportalen

motionofobjects
motionofobjects

... Motions of the Planets • The planets rise on the eastern horizon and set in the west, due to the earth’s rotation. However, like the moon, the planets usually move eastward against the background of stars. • How fast they move depends on their distance from the earth and their orbital distance from ...
Astronomy Content from Frameworks
Astronomy Content from Frameworks

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Chapter 1

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lecture4

... Galileo discovered that Venus, like the Moon, undergoes a series of phases as seen from Earth. In the Ptolemaic (geocentric) model, Venus would be seen in only new or crescent phases. However, as Galileo observed, Venus is seen in all phases, which agrees with the Copernican model as shown. ...
GY 112 Lecture Notes - University of South Alabama
GY 112 Lecture Notes - University of South Alabama

... material to explain the gravity that we knew was there. The solution? Invent invisible matter. Thus was born “dark matter”. You got to love physics. If reality doesn’t fit your ideas, change reality. The rest of us poor scientists actually have to prove our ideas. Now don’t get me wrong. I actually ...
Zodiacal Constellations.
Zodiacal Constellations.

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Our Place in the Cosmos
Our Place in the Cosmos

... and the other planets, went around the Sun. 1,750 years later Copernicus will claim the credit.  Aristarchus is also famous for devising a way of measuring the size of the moon in terms of the size of the Earth.  Hipparchus later used this to conclude that the moon had about one quarter the radius ...
Gravity (Chapter 11) Kepler`s Laws - FSU
Gravity (Chapter 11) Kepler`s Laws - FSU

... Derivation of Kepler’s Laws Kepler’s first law: With a bit more involved mathematics than we have presently at our disposal, one can show that the only closed solutions to Newton’s two body force are elliptical orbits (intermediate mechanics for physicists). Kepler’s second law: (Figure 11-8 of Tip ...
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4 times that of earth

... as cold as Earth arctic regions). ...
Introduction - Beck-Shop
Introduction - Beck-Shop

... classes of rings and ring systems were seen around all four giant planets. Some of the new discoveries have been explained, but others remain mysterious. Five comets and ten asteroids have thus far been explored close up by spacecraft (Table F.2), and there have been several missions to study the Su ...
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New Directions in Star Cluster Research

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Understanding the Biosphere
Understanding the Biosphere

... Earth was formed by aggregation of dust – Pressure produced heat that melted materials • lighter materials went to the surface (atmosphere) • heavier materials remained in the core ...
Final Exam from 2005
Final Exam from 2005

... 26. The energy emitted by the Sun is produced a. in a very small region at the very center of the Sun. b. uniformly throughout the whole Sun. c. throughout the whole Sun, but more in the center than at the surface d. from radioactive elements created in the Big Bang. 27. If any and all fusion sudden ...
Word doc - UC
Word doc - UC

... in front of) their host star as seen from Earth. (For comparison, if Earth transited the Sun as viewed another star system exactly in the plane of Earth’s orbit, the Sun’s light would be dimmed by 100 parts per million—a hundredth of a percent—for about 12 hours once every 365 days.) Although Kepler ...
Glaciopanspermia
Glaciopanspermia

... hydrothermal vents at its rocky core [5] and thus life may have evolved early; (3) has not been damaged much during the LHB, as it kept its icy mantle; (4) its impact ejecta need only a small Δv to transfer to Earth or Mars, and (5) is relatively accessible to further research. Other icy bodies In c ...
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... that survive the plunge to Earth) = ...
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Formation and evolution of the Solar System



The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.
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