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Profile Documents Logout
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PPT
PPT

... Example: new stars being formed in the Orion Nebula • The Orion Nebula is 1,500 light-years away. • We see the Orion Nebula as it ...
Powerpoint slides
Powerpoint slides

... stars within the galaxy, many audience members will try to send your second volunteer to another city! Surprisingly enough, the answer is eight feet, or approximately 20 CD diameters away. Galaxies are much closer together than stars, relative to their size. Do not be fooled, however; it is still ve ...
2 Big Bang - Net Texts
2 Big Bang - Net Texts

... the Sun, the Moon, five planets, and a sphere to which all the stars were attached. This idea held for many centuries until Galileo’s telescope helped people recognize that Earth is not the center of the universe. They also found out that there are many more stars than were visible to the naked eye. ...
Secondary Science Documents: Grade 6 – Earth/Space Science
Secondary Science Documents: Grade 6 – Earth/Space Science

... SC.6.N.2.1 Distinguish science from other activities involving thought (Not assessed on FCAT). (CC Rating=2) SC.6.N.2.2 Explain that scientific knowledge is durable because it is open to change as new evidence or interpretations are encountered. (CC Rating=2) SC.6.N.2.3 Recognize that scientists who ...
A Comment on “The Far Future of Exoplanet Direct Characterization
A Comment on “The Far Future of Exoplanet Direct Characterization

... dust particles in the solar neighborhood is not well constrained (Landgraf et al., 2000; Frisch et al., 2009; Krüger and Grün, 2009). Interstellar particles even larger than the largest inferred from the spacecraft dust detectors (of the order of 40µm in size) may have been detected by meteor radar ...
Chapter-by-Chapter Guide
Chapter-by-Chapter Guide

... Ecliptic plane: The two-dimensional plane in which Earth orbits around the Sun. Most of the other planets orbit nearly in this same plane. Axis tilt: The amount that a planet’s rotation axis is tipped relative to a line perpendicular to the ecliptic plane. The Milky Way Galaxy is a spiral galaxy, wh ...
Lecture 2: A Modern View of the Universe
Lecture 2: A Modern View of the Universe

... Example: •  This photo shows the Andromeda Galaxy as it ...
Lecture2.2014_v4 - UCO/Lick Observatory
Lecture2.2014_v4 - UCO/Lick Observatory

Class 4 Galaxies Galaxy Classification Formation of Galaxies
Class 4 Galaxies Galaxy Classification Formation of Galaxies

... transparent. The photons emitted right after the recombination can now travel undisturbed. These photons are the cosmic microwave background (CMB) radiation. Therefore the CMB is a picture of the universe at the end of this epoch. ...
T. Thompson, Jan 2007
T. Thompson, Jan 2007

... • Starbursts: what is the role of the secondary electron/positrons? • Backgrounds: neutrino (MeV to >TeV), -ray, FIR, & radio. • What is the energy density of cosmic rays in starburst galaxies? ...
Reflection #12: The Journey Ends
Reflection #12: The Journey Ends

... exploration, people have developed many tools and products that have become very important in enriching our lives. Humans have traveled to the moon, landed probes on Mars and Venus, and sent probes speeding past Jupiter, Saturn and Uranus. More recently we have built an International Space Station, ...
Dynamical theory of the solar wind
Dynamical theory of the solar wind

... energy.* A tightly bound atmosphere traditionally has been considered to be in hydrostatic equilibrium. Escape from the atmosphere is limited to evaporation, or thermionic emission, of the small portion of atoms in the outer layers whose thermal velocity exceeds the escape velocity, as discussed by ...
Intermittent Chaos in Nonlinear Wave-Wave - mtc-m16:80
Intermittent Chaos in Nonlinear Wave-Wave - mtc-m16:80

... where ( ˙ ) ≡ d/dξ. The damping rate γ is positive, so that wave 0 is linearly unstable and waves 1 and 2 are linearly damped. Note that an equation for a˙2 is not included in (4)–(6), since we set a1 = a2 and the expressions for a˙1 and a˙2 are equivalent. 3. Nonlinear Dynamics Analysis The dynamic ...
Physics Chapter 3 - Pearson Schools and FE Colleges
Physics Chapter 3 - Pearson Schools and FE Colleges

... Hubble Space Telescope, which orbits the Earth in space. We have obtained more information about the planets in our solar system by sending unmanned probes to the planets. Space probes have flown close to all the planets, and some have landed on Venus and Mars. In 1990 Voyager 1 photographed the sol ...
EEn.1.1 Explain the Earth`s role as a body in space. EEn
EEn.1.1 Explain the Earth`s role as a body in space. EEn

... center of the primary (the larger body).  For example, the moon does not orbit the exact center of the Earth, but a point on a line between the Earth and the Moon  approximately 1,710 km below the surface of the Earth, where their respective masses balance.  This is the point about which the Earth a ...
Staring Back to Cosmic Dawn - UC-HiPACC
Staring Back to Cosmic Dawn - UC-HiPACC

... of the universe’s existence. As of March 2014, the spectroscopic record-holder is a galaxy at a redshift of 7.51, corresponding to a time just 700 million years after the Big Bang. Despite being less than a tenth the mass of our Milky Way, this diminutive galaxy is churning out stars at a rate about ...
CHAPTER XI
CHAPTER XI

... Jupiter is on one side or on the other of the Sun, relatively to the Earth, at the minimum and maximum distance. If the light takes 16 minutes, 34 seconds to traverse the terrestrial orbit, it must take less than that time, or 8 minutes, 17 seconds, to come to us from the Sun, which is situated at ...
Media Alert A new spin on star-forming galaxies
Media Alert A new spin on star-forming galaxies

... a few rare galaxies, known as the DYNAMO galaxies. They still look clumpy even though they’re seen “only” 500 million years in the past. Dr Obreschkow said looking at galaxies 500 million years ago was like looking at a passport photo taken a year ago. “We see that galaxy the way it probably looks n ...
Name
Name

... B) why have we not observed alien civilizations even though simple arguments would suggest that some of these civilizations ought to have spread throughout the galaxy by now? C) why hasn’t life evolved on Mars if it has evolved on Earth? D) why does a spiral galaxy's rotation speed depend on its mas ...
Name - MIT
Name - MIT

... A) if Supernovas occurs frequently and some supernovas occur nearby, why hasn’t life on Earth been destroyed? B) why have we not observed alien civilizations even though simple arguments would suggest that some of these civilizations ought to have spread throughout the galaxy by now? C) why hasn’t l ...
Name - MIT
Name - MIT

... B) why have we not observed alien civilizations even though simple arguments would suggest that some of these civilizations ought to have spread throughout the galaxy by now? C) why hasn’t life evolved on Mars if it has evolved on Earth? D) why does a spiral galaxy's rotation speed depend on its mas ...
Angular measurements
Angular measurements

... That means that there is a chance that the ISS will pass through the field of view of any virtually every other imaging satellite in orbit, whether in a polar or geostationary orbit. If that should happen, discuss why you would (or would not) expect the ISS to be detected by: i. The earth-viewing Hu ...
Astronomy - False River Academy
Astronomy - False River Academy

... ever stop shining? Since the first glimpse of the night sky, humans have been fascinated with the stars, planets, and universe that surrounds us. This course will introduce students to the study of astronomy, including its history and development, basic scientific laws of motion and gravity, the con ...
Searching for Dwarf Galaxies and Population III Star
Searching for Dwarf Galaxies and Population III Star

... sources is the chemically unevolved surroundings of a large galaxy or proto-cluster of galaxies at high redshift. The central sources are likely to have ionized a local “bubble” through which strong Lyman  emission can escape from surrounding dwarf galaxies. Thus, near-infrared observations of thes ...
Here - ScienceA2Z.com
Here - ScienceA2Z.com

... become classified as dwarf planets are Sedna, Orcus, and Quaoar. The remainder of the objects in orbit around the Sun are small Solar System bodies (SSSBs). Natural satellites, or moons, are those objects in orbit around planets, dwarf planets and SSSBs, rather than the Sun itself. Astronomers usual ...
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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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