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Distance - courses.psu.edu
Distance - courses.psu.edu

... 3. a) A star with the Sun's luminosity, but located 2 AU from Earth instead of 1 AU, would appear how bright relative to the Sun? b) A star with the Sun's luminosity, but located 20 AU from Earth instead of 1 AU, would appear how bright relative to the Sun? 4. Jupiter's moon Europa, which effectivel ...
Exploring the Solar System Jeopardy!
Exploring the Solar System Jeopardy!

... Name the eight planets in order by increasing distance from the sun (closest to furthest). ...
ptolemy day 21 - Arts of Liberty
ptolemy day 21 - Arts of Liberty

... from the theory back to what the appearances must be, if we don’t know or can’t remember.) Mercury’s greatest elongations from the sun are smaller than those of Venus, which gets a little further from the sun. Incidentally, this makes Mercury a pain to observe. It is so close to the sun that it is g ...
Workbook IAC
Workbook IAC

... months. Comets appear to be bright balls with fat tails. They do not fall rapidly in the sky; you would have to watch one for hours or days to see its movement. The center of a comet is a ball of frozen gas, dust, and water. Like planets or moons, comets orbit around the Sun. The comet that causes ...
A Absolute Magnitude A scale for measuring the actual
A Absolute Magnitude A scale for measuring the actual

... The point in the orbit of the Moon or other satellite where it is farthest from the Earth. Apparent Magnitude The apparent brightness of an object in the sky as it appears to an observer on Earth. Bright objects have a low apparent magnitude while dim objects will have a higher apparent magnitude. A ...
Day 3
Day 3

... •  However, about 1/3 of the hot Jupiters do have a hot upper atmosphere, and we still don’t know ...
teacher resource - Michigan Science Center
teacher resource - Michigan Science Center

... About 4.6 billion years ago, our solar system didn’t exist. Our star, the Sun, was just about to be born out of a molecular cloud that was over 600 trillion kilometers wide. This cloud was made up of mostly hydrogen and helium gas with some interstellar dust. Nearby an explosion occurred causing par ...
- Europhysics News
- Europhysics News

... The huge diversity in the physical and orbital properties of exoplanets forces us to reconsider the model of planetary formation currently accepted for the solar system. This model is based upon the properties of planetary orbits, mostly coplanar, circular and concentric around the Sun. Following th ...
Chapter 29: Stars - Mr. Pelton Science
Chapter 29: Stars - Mr. Pelton Science

... compositions despite the differences in their spectra. • Typically, a star is 70% H, 25% He, and 2% other elements ...
Two-Layer Solar Interior Model Presentation
Two-Layer Solar Interior Model Presentation

... The page reproduced to the left is just for cosmetics. You do not need to read it. It is a visual reminder that if an astronomer understands the reactions that go on within the Sun and the pressure and temperature conditions that control those reactions, they can calculate the properties of the inte ...
The Planets
The Planets

... large area but is preferable to the second activity as it allows students to compare the sizes of the planets to the space between them and better demonstrates the hugeness of space. The second activity, “Scaling the Solar System with Toilet Paper,” has the advantage of requiring less room. On its s ...
June 2013 Kepler Space Telescope Update
June 2013 Kepler Space Telescope Update

... and actively starforming galaxies were merging into an extremely massive elliptical galaxy. The result, published in the journal Nature, suggests that a merger between gasrich galaxies is an efA pair of merging galaxies in the young Universe discovered with Herschel (left panel) and imfective mechan ...
Other Solar Systems Around Other Stars
Other Solar Systems Around Other Stars

... • Strongly suggests over 50% of sun-like stars are have planetary systems around them ...
4-6 Script
4-6 Script

... The student demonstrates an understanding of cycles influenced by energy from the sun and by Earth’s position and motion in our solar system by: SD3.1 [4]: recognizing changes to length of daylight over time and its relationship to seasons. The student demonstrates an understanding of the theories r ...
Winter Interim Assessment Review
Winter Interim Assessment Review

... Mars. The outer “Jovian,” planets are Jupiter, Saturn, Uranus and Neptune. Which statement best compares the differences between the inner and outer planets? A. The outer planets are warmer and larger than the inner planets. B. The inner planets have rings and are cooler than the outer planets. C. T ...
Lecture 20: Formation of Planets, Exoplanets 3/30
Lecture 20: Formation of Planets, Exoplanets 3/30

... • heavier elements (metals, silicates) condense first, at higher temperatures, then molecules like water  H and He remain gases • density and temperature falls with distance from star. Planet formation occurs when not too far and not too close • “snow line”  separates type of planets being formed ...
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... Topics: The Night Sky … ...
Earth Science 24.3 The Sun
Earth Science 24.3 The Sun

... with sunspot activity are solar flares. Solar flares are brief outbursts that normally last about an hour and appear as a sudden brightening of the region above a sunspot cluster. During their existence, solar flares release enormous amounts of energy, much of it in the form of ultraviolet, radio, a ...
Test Bank for Life in the Universe, Third Edition Chapter 2: The
Test Bank for Life in the Universe, Third Edition Chapter 2: The

... 11. In the heliocentric (Sun-centered) model, apparent retrograde motion is due to A) relative motion between the Earth and another planet in its orbit B) the Earth reversing the direction of its orbit about the Sun C) a planet moving in a small circle, the center of which moves in a larger circle a ...
Planets - learnfactsquick.com
Planets - learnfactsquick.com

... of the Greek god Hermes, the messenger of the Gods. The planet probably received this name because it moves so quickly across the sky. Mercury has been known since at least the time of the Sumerians (3rd millennium BC). It was sometimes given separate names for its apparitions as a morning star and ...
How much Sugar in Gum
How much Sugar in Gum

... Background and Misconceptions: Since the distances are vast in the solar system and between stars, astronomers have created various units to represent these large distances. They use them only because they are easier to use and they are agreed upon quantities. The common units are: ...
Space (Part 1)
Space (Part 1)

... has cleared the area around its orbit of objects.” This photograph shows Pluto and its moon, Charon. Pluto’s orbit is surrounded by smaller objects which have not been cleared by its gravitational field. Pluto and the other ‘smaller’ planet-like objects such as Eris and Ceres have now been reclassif ...
Document
Document

... Providing the most detailed and precise measurements of the temperature structure, the interior rotation, and gas flows in the solar interior. Measuring the acceleration of the slow and fast solar wind. Identifying the source regions and acceleration mechanism of the fast solar wind in the magnetica ...
Eclipse of the Sun 1 September 2016
Eclipse of the Sun 1 September 2016

... • This method must be used only be experienced telescope users who are familiar with the use of a motorised telescope equipped with a front filter • The front filter must be safely secured at the front of the ...
Spying into the lives of the stars
Spying into the lives of the stars

... Explaint that we know that, like humans, stars are born, grow up, and die. It’s just that stars take longer to do these things: millions and billions of years. You can’t really just take a single star and follow it from birth to death, so today, we will use some of the tools that astronomers use to ...
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Solar System



The Solar System comprises the Sun and the planetary system that orbits it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies such as comets and asteroids. Of those that orbit the Sun indirectly, two are larger than the smallest planet.The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed largely of substances with relatively high melting points compared with hydrogen and helium, called ices, such as water, ammonia and methane. All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic.The Solar System also contains smaller objects. The asteroid belt, which lies between Mars and Jupiter, mostly contains objects composed, like the terrestrial planets, of rock and metal. Beyond Neptune's orbit lie the Kuiper belt and scattered disc, populations of trans-Neptunian objects composed mostly of ices, and beyond them a newly discovered population of sednoids. Within these populations are several dozen to possibly tens of thousands of objects large enough to have been rounded by their own gravity. Such objects are categorized as dwarf planets. Identified dwarf planets include the asteroid Ceres and the trans-Neptunian objects Pluto and Eris. In addition to these two regions, various other small-body populations, including comets, centaurs and interplanetary dust, freely travel between regions. Six of the planets, at least three of the dwarf planets, and many of the smaller bodies are orbited by natural satellites, usually termed ""moons"" after the Moon. Each of the outer planets is encircled by planetary rings of dust and other small objects.The solar wind, a stream of charged particles flowing outwards from the Sun, creates a bubble-like region in the interstellar medium known as the heliosphere. The heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of interstellar wind; it extends out to the edge of the scattered disc. The Oort cloud, which is believed to be the source for long-period comets, may also exist at a distance roughly a thousand times further than the heliosphere. The Solar System is located in the Orion Arm, 26,000 light-years from the center of the Milky Way.
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