Chapter 18 The Interstellar Medium
... A wide-angle view of the Milky Way—the dark regions are dust clouds, blocking light from the stars beyond ...
... A wide-angle view of the Milky Way—the dark regions are dust clouds, blocking light from the stars beyond ...
Physivd Preliminary Module 8.5 The Cosmic Engine
... The earth is spherical and surrounded by eight giant transparent concentric spheres that bore all the objects in the sky. The spheres revolved around the earth on different axes at different uniform speeds. This very roughly explained the diurnal motion of the fixed stars, sun, moon and the five “wa ...
... The earth is spherical and surrounded by eight giant transparent concentric spheres that bore all the objects in the sky. The spheres revolved around the earth on different axes at different uniform speeds. This very roughly explained the diurnal motion of the fixed stars, sun, moon and the five “wa ...
Astrophysics - Mr Priest`s Physics Notes
... Infrared astronomers study parts of the infrared spectrum, which consists of electromagnetic waves with wavelengths ranging from just longer than visible light to 1,000 times longer than visible light. Earth’s atmosphere absorbs infrared radiation, so astronomers must collect infrared radiation from ...
... Infrared astronomers study parts of the infrared spectrum, which consists of electromagnetic waves with wavelengths ranging from just longer than visible light to 1,000 times longer than visible light. Earth’s atmosphere absorbs infrared radiation, so astronomers must collect infrared radiation from ...
Expanding Universe Lab
... majority of galaxies he observed had spectra that were red shifted. If these shifts to the red were the result of Doppler shifts, the conclusion is that these galaxies were all moving away from us. In the 1920s, Edwin Hubble of the Mt. Wilson Observatory measured distances to many galaxies using Cep ...
... majority of galaxies he observed had spectra that were red shifted. If these shifts to the red were the result of Doppler shifts, the conclusion is that these galaxies were all moving away from us. In the 1920s, Edwin Hubble of the Mt. Wilson Observatory measured distances to many galaxies using Cep ...
So, our cosmic address is
... The nine planets of the solar system in order from the sun. The relative sizes are accurate, but relative distances from the sun are not. ...
... The nine planets of the solar system in order from the sun. The relative sizes are accurate, but relative distances from the sun are not. ...
Teachers` Manual - Amundsen High School
... The Astronomical Unit - distance between Earth and Sun ...
... The Astronomical Unit - distance between Earth and Sun ...
Chap 18 Cosmology v2
... explosively in an event called the Big Bang. The Hubble law describes the ongoing expansion of the universe and the rate at which superclusters of galaxies move apart. ...
... explosively in an event called the Big Bang. The Hubble law describes the ongoing expansion of the universe and the rate at which superclusters of galaxies move apart. ...
Correct answers shown in boldface. Be sure to write your name and
... 31. The mass of a cluster of galaxies a. results in broadening the spectral lines from active nuclei in the cluster b. causes the cluster to glow all over as things fall into it c. makes the emission lines of the galaxies in the cluster shift wavelength significantly due to relativity d. is almost a ...
... 31. The mass of a cluster of galaxies a. results in broadening the spectral lines from active nuclei in the cluster b. causes the cluster to glow all over as things fall into it c. makes the emission lines of the galaxies in the cluster shift wavelength significantly due to relativity d. is almost a ...
The star Betelgeuse is about 500 light years away from us. If this star
... a) Procyon is moving at the same speed as Acrux b) Procyon is moving more slowly than Acrux c) Procyon and Acrux are BOTH moving away from the Sun d) both b & c e) none of the above Which of the following is NOT an implication of Hubble's law? a) the Universe is expanding b) we are at the center of ...
... a) Procyon is moving at the same speed as Acrux b) Procyon is moving more slowly than Acrux c) Procyon and Acrux are BOTH moving away from the Sun d) both b & c e) none of the above Which of the following is NOT an implication of Hubble's law? a) the Universe is expanding b) we are at the center of ...
a to z of astronomy
... together in the sky, but may be physically very distant from each other. BLACK BODY An imaginary object which absorbs with 100% efficiency at all wavelengths. It is quite well approximated by a hole in box. The energy emitted by a black body has a characteristic shape (the black body spectrum), whic ...
... together in the sky, but may be physically very distant from each other. BLACK BODY An imaginary object which absorbs with 100% efficiency at all wavelengths. It is quite well approximated by a hole in box. The energy emitted by a black body has a characteristic shape (the black body spectrum), whic ...
IT`S UNIVERSAL GRAVITY CONCEPTS
... had yet to be discovered. They calculated where the unknown planet would have to be in order to produce the gravitational effects observed on Uranus. Observatories pointed their telescopes in the predicted location —and found Neptune. All the planets discovered orbiting stars other than the Sun were ...
... had yet to be discovered. They calculated where the unknown planet would have to be in order to produce the gravitational effects observed on Uranus. Observatories pointed their telescopes in the predicted location —and found Neptune. All the planets discovered orbiting stars other than the Sun were ...
(the largest solar system planet) represents at
... (Mercury, Venus, Earth, Mars), four outer planets (Jupiter, Saturn, Uranus, Neptune), approximately three “dwarf planets,” more than 130 satellites (orbiting moons), an asteroid belt, and entering comets. As one ventures into space, the distances from one planet to another are vast. In fact, the sol ...
... (Mercury, Venus, Earth, Mars), four outer planets (Jupiter, Saturn, Uranus, Neptune), approximately three “dwarf planets,” more than 130 satellites (orbiting moons), an asteroid belt, and entering comets. As one ventures into space, the distances from one planet to another are vast. In fact, the sol ...
phys-1600 - Dave Heppenstall
... This is NOT a math course. The Scale of the Cosmos: The ancient Greeks were perhaps the first to study Astronomy scientifically. This study was not rediscovered until the Renaissance. Our solar system is five billion years old with an approximate life expectancy of ten billion years. 1 Astro ...
... This is NOT a math course. The Scale of the Cosmos: The ancient Greeks were perhaps the first to study Astronomy scientifically. This study was not rediscovered until the Renaissance. Our solar system is five billion years old with an approximate life expectancy of ten billion years. 1 Astro ...
Meteors, Asteroids, and Comets (Powerpoint)
... dense rock and has the size and mass of an extremely heavy bowling ball. If you are lucky enough to find a meteorite just after impact, do not pick it up -- parts of it are likely to be either very hot or very cold. ...
... dense rock and has the size and mass of an extremely heavy bowling ball. If you are lucky enough to find a meteorite just after impact, do not pick it up -- parts of it are likely to be either very hot or very cold. ...
Document
... Moreover, the Sun's circular orbit about the galactic center is just right; through a combination of factors it manages to keep out of the way of the Galaxy's dangerous spiral arms. Our solar system is also far enough away from the galactic center to not have to worry about disruptive gravitational ...
... Moreover, the Sun's circular orbit about the galactic center is just right; through a combination of factors it manages to keep out of the way of the Galaxy's dangerous spiral arms. Our solar system is also far enough away from the galactic center to not have to worry about disruptive gravitational ...
Earth Science CA Standard Study Guide
... Soon after the Big Bang there were ripples in space that consisted of concentrations of matter Today most of all visible matter is in galaxies The space between galaxies is mostly empty Each galaxy is composed of billions of stars There are billions of galaxies in the universe ...
... Soon after the Big Bang there were ripples in space that consisted of concentrations of matter Today most of all visible matter is in galaxies The space between galaxies is mostly empty Each galaxy is composed of billions of stars There are billions of galaxies in the universe ...
Voyage: A Journey Through Our Solar System Grades K
... The Sun is a star. Why does it look so big and bright compared to the other stars? Because it is much closer than the other stars, not because it is bigger—it is only an average sized star. Did the position of Mercury surprise you? Mercury orbits the Sun faster than any other planet (once every 88 d ...
... The Sun is a star. Why does it look so big and bright compared to the other stars? Because it is much closer than the other stars, not because it is bigger—it is only an average sized star. Did the position of Mercury surprise you? Mercury orbits the Sun faster than any other planet (once every 88 d ...
ν - Luleå tekniska universitet
... A great island of stars in space, all held together by gravity and orbiting a common center ...
... A great island of stars in space, all held together by gravity and orbiting a common center ...
Quiz Reviews - Orion Observatory
... 4. What is the cosmic microwave background radiation? Why did it have to exist? How was it discovered? Who got credit for discovering it? 5. Why did ripples in the microwave background radiation have to exist for the Big Bang theory? How were they discovered? 6. What is a type 1A supernova? Why is i ...
... 4. What is the cosmic microwave background radiation? Why did it have to exist? How was it discovered? Who got credit for discovering it? 5. Why did ripples in the microwave background radiation have to exist for the Big Bang theory? How were they discovered? 6. What is a type 1A supernova? Why is i ...
Week 11 Concept Summary
... (b) Parallax: Looking at how much a star moves due to the Earth orbiting the Sun, we get the distance geometrically. However, this requires us to already know how big 1 AU is, hence it builds on radar ranging. Parallax is only useful out to a few hundred parsecs; only the nearest stars. (c) Main Seq ...
... (b) Parallax: Looking at how much a star moves due to the Earth orbiting the Sun, we get the distance geometrically. However, this requires us to already know how big 1 AU is, hence it builds on radar ranging. Parallax is only useful out to a few hundred parsecs; only the nearest stars. (c) Main Seq ...
The Sky Tonight - Northern Stars Planetarium
... Planetary Nebula: A circular nebula, composed of many types of gases, that is expanding into space. It’s the result of the death of an average star (like the Sun). The nebulosity you see is the outer layers of the star that have been blown out into space. Planetary nebula actually have no relationsh ...
... Planetary Nebula: A circular nebula, composed of many types of gases, that is expanding into space. It’s the result of the death of an average star (like the Sun). The nebulosity you see is the outer layers of the star that have been blown out into space. Planetary nebula actually have no relationsh ...
![Question 6 [11]](http://s1.studyres.com/store/data/002362724_1-d28e5e3b5fe7e9e2fc1d9f01e4127b67-300x300.png)
Question 6 [11]
... There is an interesting relationship between the arrangements of the planets around the sun. The differences in the distances from the sun between subsequent planets show an interesting pattern. This was calculated before Uranus, Neptune and Pluto were discovered and astronomers actually found Uranu ...
... There is an interesting relationship between the arrangements of the planets around the sun. The differences in the distances from the sun between subsequent planets show an interesting pattern. This was calculated before Uranus, Neptune and Pluto were discovered and astronomers actually found Uranu ...
2. A giant hand took one of the planets discovered
... 2. A giant hand took one of the planets discovered around other stars and put it in the solar system at the same distance from the sun as from its star. The mass of the planet is approximately that of Jupiter and the orbit is approximately that of Earth. These are the “hot Jupiters”, as big as Jupit ...
... 2. A giant hand took one of the planets discovered around other stars and put it in the solar system at the same distance from the sun as from its star. The mass of the planet is approximately that of Jupiter and the orbit is approximately that of Earth. These are the “hot Jupiters”, as big as Jupit ...
Document
... Understand that the sun is many thousands of times closer to the earth than any other star. Light from the sun takes a few minutes to reach the earth, but light from the next nearest star takes a few years to arrive. The trip to that star would take the fastest rocket thousands of years.
... Understand that the sun is many thousands of times closer to the earth than any other star. Light from the sun takes a few minutes to reach the earth, but light from the next nearest star takes a few years to arrive. The trip to that star would take the fastest rocket thousands of years.
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.