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Quiz # 1
Quiz # 1

Comets - Cloudfront.net
Comets - Cloudfront.net

... To the very edge of the solar system. Most of these orbit in the same plane as the planets forming a “belt” ...
Earth and Space - Sun, Moon and Stars
Earth and Space - Sun, Moon and Stars

... communicate information from careful observations and simple investigation through a variety of methods. ...
Saturn - Cloudfront.net
Saturn - Cloudfront.net

... • It is the source of (almost) all energy for life on Earth. • On the Sun’s surface ,there are dark patches known as sunspots. These are patches of gas that looks dark since they are cooler than their surroundings. ...
Homework 2 (Due Sept 18, 2014)
Homework 2 (Due Sept 18, 2014)

... this chamber, a feather would fall at the same rate as a rock.! c. When an astronaut goes on a space walk outside the Space Station, she will quickly ! float away from the station unless she has a tether holding her to the station.! d. If the Sun were magically replaced with a giant rock that had pr ...
Document
Document

... d. None is as large as the terrestrial planets. _____ 22. Why do scientists think the Martian moons may be asteroids caught by the planet’s gravity? a. They are very small moons. b. They are very dark. c. They are similar in composition. d. They are oddly shaped. _____ 23. Who discovered the four la ...
Planets - uni
Planets - uni

The Sizes and Numbers of Objects in the Universe
The Sizes and Numbers of Objects in the Universe

Coursework 7 File
Coursework 7 File

... physically collide with each other before undergoing fusion, comment on the answer that you obtained in part (1). 3. Calculate the temperature that is required at the centre of the Sun for close approaches between hydrogen nuclei to result in physical collisions. 4. What missing physics may explain ...
etlife_exoplanets - University of Glasgow
etlife_exoplanets - University of Glasgow

... We can tell that planets are there by the effect they have on their star. ...
Sept2 - University of Arizona
Sept2 - University of Arizona

... Earth. To make the observations as accurate as possible, it was necessary to place the Earth slightly off center of the orbits, but to preserve symmetry that meant that there was an equal place (“Equant”) opposite the Earth from the center. The combined motion of the planet and the resulting retrogr ...
Slayt 1
Slayt 1

... However, as a gas temperature goes up, the average speed of the particles goes up and the protons get closer before repelling one another. If the proton get very close, the short-range nuclear force ...
File
File

... were the day before. Solar Day is the time for the Sun to move from noon (highest position) to noon, an average of 24 hours. Longer than the rotational period, because the Earth moves in orbit one degree each day. Varies depending on the speed of Earth in orbit. Every solar day, the Sun is in the sa ...
Planetary Cycles Witness To The Creator
Planetary Cycles Witness To The Creator

Chapter 9: Our Star, the Sun
Chapter 9: Our Star, the Sun

... other atmospheric phenomena • prominences • solar flares ...
Earth`s Origin & Early Evolution
Earth`s Origin & Early Evolution

... accretion'. Planetesimals are swept up into well defined zones around the sun which approximate to the present orbits of the terrestrial planets. The process leads eventually to a small number of large planetary bodies. Evidence for this impacting process can be seen in the early impact craters foun ...
Earth
Earth

... Our Sun is not unique in the universe. It is a common middle-sized yellow star which scientists have named Sol, after the ancient Roman name. This is why our system of planets is called the Solar System. There are trillions of other stars in the universe just like it. Many of these stars have their ...
Week 4
Week 4

... Most extra-solar planets are discovered through the “wobble” they create in their parent star’s ...
Year 6 Space Newsletter
Year 6 Space Newsletter

... been known to make a triangular shape. Another strange thing is that they can be all different shapes! William. Aliens have been found on the surface of the moon by astronauts. Scientists send up robot s to find alien faeces so they can find out more about alien bodies and lives. As well as explorin ...
20.2-the-Solar_System
20.2-the-Solar_System

... Solid, rocky, surface, 71% liquid water ...
Astronomy Study Guide Key Vocabulary: Planet Jovian Moon
Astronomy Study Guide Key Vocabulary: Planet Jovian Moon

... Know why the moon rises and sets later each day over the course of a ~28 day period. Know why the moon appears to go through phases (different parts of the moon lit by the Sun) over the course of a ~28 day period. One half of the moon is always facing the Sun  One half of the moon is always lit Kno ...
Friends of the Planetarium Newsletter September
Friends of the Planetarium Newsletter September

... NASA's Pluto-bound New Horizons spacecraft has traversed the orbit of Neptune. This is its last major crossing en route to becoming the first probe to make a close encounter with distant Pluto on July 14, 2015. The sophisticated piano-sized spacecraft, which launched in January 2006, reached Neptun ...
Observing the Sky - University of Northern Iowa
Observing the Sky - University of Northern Iowa

PHYS 215 - First Major Exam MULTIPLE CHOICE
PHYS 215 - First Major Exam MULTIPLE CHOICE

... 24) In order to find mass of the earth, Newton’s laws of motion and law of Gravity are used to derive a relation between period (P) and average distance (a) of the moon from the earth, and mass (M) of the earth. Find mass of the earth M if P = 27.4 days, a = 385000 km. (neglect mass of the moon) a) ...
What moon phase is shown in each picture
What moon phase is shown in each picture

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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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