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The Cosmic Microwave Background
The Cosmic Microwave Background

... of space-time, due to the gravitational effects of this matter can only be positively or negatively cuved or flat. ...
D1 Stellar quantities (PPT)
D1 Stellar quantities (PPT)

... Again, four protons are used to undergo the fusion process; carbon-12 is both one of the fuels and one of the products. Two positrons, two neutrinos and three gamma-ray photons are also emitted in the overall ...
PHYS103 Hour Exam No. 2 Page: 1 1 The time it takes for Jupiter to
PHYS103 Hour Exam No. 2 Page: 1 1 The time it takes for Jupiter to

... 2 Module 010.504-g01 Solar System Overview Comets 3 Module 011.209 The Terrestrial Planets Venus Moons 4 Module 009.404-g01 Science Models of Gravity Unifying Physical Law 5 Module 012.107-g01 The Jovian Planets Jupiter Surface 6 Module 009.301 Science Models of Gravity Universal Gravitation 7 Modul ...
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...  What makes up our solar system?  How can we measure distances?  What is the Milky Way?  What is your universal address? ...
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... Northern Hemisphere; more specifically: a small section which lies within the Ursa Major constellation.  Field was selected by the following criteria  Needed to be outside of the Milky Way’s disk of dust  Could not contain very bright objects or anything that emitted too much infrared, x-ray, or ...
The Cosmos, the Solar System and the Primeval Earth
The Cosmos, the Solar System and the Primeval Earth

... universe is then no longer a static system, but a dynamic one which is continually expanding. The question then arises as to whether this expansion process will continue infinitely, or whether it can be put into reverse if gravitation forces the system to collapse. This could happen if the density o ...
Venus Express - Nuffield Foundation
Venus Express - Nuffield Foundation

... Astrium company at Stevenage in Hertfordshire. It carries a number of instruments for studying the planet (Figure 2): • MAG looks at the planet’s magnetic field which does not come from inside the planet, but from its interaction with charged particles in the solar wind. • VIRTIS uses ultraviolet, v ...
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Archaeology of the Universe
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Astronomy 401 Lecture 1 Overview of the Universe 1 Class overview
Astronomy 401 Lecture 1 Overview of the Universe 1 Class overview

... • Assumed that the universe is infinitely old. When we see stars farther away, we’re also seeing stars farther back in time. If universe has finite age t0  λ/c, then we can’t yet see stars at a distance greater than r ∼ ct0 , and only a fraction F ∼ ct0 /λ of the night sky will be covered with star ...
FCAT 2.0 Science Review Big Idea 1: The Practice of Science THE
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...  The sun is the center of the solar system , with many objects orbiting around it.  The force of gravity holds the solar system together.  Distances in the solar system are measured in astronomical units (AU). • One AU equals the average distance between Earth and the sun; about 150 million km.  ...
Semester 2 Course Review
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... How does the angle of the sun’s rays impact climate differently from the equator to the poles? What effect do lakes and oceans have on climate? What effect does geography have on climate? How can global climate change be studied? How have different conditions on earth contributed to global climate c ...
Cosmological Constant
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... Since Newton believed the universe was eternal and unchanging, he believed that the universe was therefore infinite. Solving Einstein’s field equations resulted in the constant of integration Λ. This energy density could balance the mass energy density and allow for a static Universe that contains m ...
Getting to Know: Structure of the Universe
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... Remember that the universe contains billions of galaxies, more than any person can count. In this lesson, you will learn more about what scientists have found out about the universe so far—and what questions they still have. ...
Article 8
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... pressure in the gas around it that balances the inward pull of gravity. When the released energy reaches the outer layers of the ball of gas and dust, it moves off into space in the form of electromagnetic radiation. The ball, now a star, begins to shine. New stars come in a variety of sizes and col ...
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... What would happen if the Sun were replaced by a 1M~ black hole? How big would a 1 M~ black hole be? How does the Schwarzschild radius vary with a black hole’s mass? How do we detected black holes if we cannot see them? Why would jumping into a black hole be suicide? Why aren’t black holes ‘cosmic va ...
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... Obviously high speeds are desirable because you want to get somewhere as fast as possible, however, that does not mean high speeds are necessary. It has been suggested that galactic colonisation by robotic probes could take 5-50 million years, not long on a galactic timescale.[13] These so called Br ...
Astronomy
Astronomy

... Directions: Answer the following questions with the most correct answers. TRUE/FALSE: 1. _____ Hubble classified galaxies 2. _____ There are three main classifications of galaxies 3. _____ Elliptical galaxies have little or no star formation 4. _____ Elliptical galaxies have little or no rotation 5. ...
A Possible Effect of Cosmic Rays on Celestial Chemical Composition
A Possible Effect of Cosmic Rays on Celestial Chemical Composition

... smaller than that gtven in (1), so that the general cosmic rays impinging on the solar surface give a contribution to such nuclear transformations less than the solar ones do. (ii) The same reason applies to the nuclear transformations of interstellar elements ; those are quite small, though not neg ...
Galaxies - WordPress.com
Galaxies - WordPress.com

... because it does not have to view things through our ...
gravitation - Sakshieducation.com
gravitation - Sakshieducation.com

... g) In the white dwarf stage further gravitational collapse is halted due to the balance between repulsion of electrons and gravitational attraction. The repulsion between electrons is called degenerate electron pressure or degeneracy pressure. h) The degeneracy pressure is because all the lower avai ...
There are billions of galaxies, many containing
There are billions of galaxies, many containing

... seems to be as observed from the earth. This apparent brightness allows us to determine its distance. The farther it is from the sun, the dimmer it will appear. If we know any two of the three—absolute brightness, apparent brightness, and distance—we can compute the third, distance in this case. It ...
ODU booklet 2 Teachers booklet Sept 2014 (7.5MB Word)
ODU booklet 2 Teachers booklet Sept 2014 (7.5MB Word)

... Time runs more slowly for the twin who goes into space, so when they return they should be younger than their twin who stayed at home. However – space travel requires acceleration. This can only be dealt with using General Relativity, which is beyond this course. ...
2014-2015 SCIENCE Instructional Curriculum Plan Grade: K
2014-2015 SCIENCE Instructional Curriculum Plan Grade: K

... SC.5.E.5.In.1: Identify that a galaxy is made of a very large number of stars and the planets that SC.5.E.5.1 Recognize that a galaxy consists of gas, dust, and many stars, including any objects orbiting the stars. Identify orbit them. our home galaxy as the Milky Way. SC.5.E.5.Su.1: Recognize that ...
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Outer space



Outer space, or just space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvin in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. In most galaxies, observations provide evidence that 90% of the mass is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Data indicates that the majority of the mass-energy in the observable Universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.There is no firm boundary where space begins. However the Kármán line, at an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space. Despite the drafting of UN resolutions for the peaceful uses of outer space, anti-satellite weapons have been tested in Earth orbit.Humans began the physical exploration of space during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches. Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System. Due to the high cost of getting into space, manned spaceflight has been limited to low Earth orbit and the Moon.Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental issues, the economic cost of putting objects, including humans, into space is high.
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