Unpublished draft available in format
... astronomy is constantly being sustained or even increased by the development of new techniques and instruments; radio astronomy and space observatories are two formidable examples in recent years. ...
... astronomy is constantly being sustained or even increased by the development of new techniques and instruments; radio astronomy and space observatories are two formidable examples in recent years. ...
doc - Discover Earth Science
... 2. Terrestrial daily motion causes celestial daily motion 3. Most stars appear to circle around Polaris because it’s located directly above the Earth’s axis of rotation - these are called circumpolar stars p.377 21.1 4. Stars rise in the east, set in the west, circle around Polaris in the north, and ...
... 2. Terrestrial daily motion causes celestial daily motion 3. Most stars appear to circle around Polaris because it’s located directly above the Earth’s axis of rotation - these are called circumpolar stars p.377 21.1 4. Stars rise in the east, set in the west, circle around Polaris in the north, and ...
Chapter 13: Interstellar Matter and Star Formation
... 1. Herschel, the discoverer of Uranus, proposed that the dark patches we see in the sky are simply large spaces between the stars that allow us to see into the dark void beyond. 2. Stars are not all at the same distance from us. For us to be able to see through gaps between the stars, the gaps thus ...
... 1. Herschel, the discoverer of Uranus, proposed that the dark patches we see in the sky are simply large spaces between the stars that allow us to see into the dark void beyond. 2. Stars are not all at the same distance from us. For us to be able to see through gaps between the stars, the gaps thus ...
Chapter 13
... 5. O and B stars may undergo a period of instability that is more violent than the one for stars of low mass; during this period, they blow off material at supersonic speeds. 6. Astronomers calculate that a star with a mass greater than 100 solar masses will emit radiation so intense that it will pr ...
... 5. O and B stars may undergo a period of instability that is more violent than the one for stars of low mass; during this period, they blow off material at supersonic speeds. 6. Astronomers calculate that a star with a mass greater than 100 solar masses will emit radiation so intense that it will pr ...
Wonderworld of Space
... Many are discovered by amateur astronomers. Comets are invisible except when they are near the Sun. Most have orbits which take them far beyond the orbit of Pluto; these are seen once and then disappear for millennia. However there are some which appear to us at regular intervals. For example the mo ...
... Many are discovered by amateur astronomers. Comets are invisible except when they are near the Sun. Most have orbits which take them far beyond the orbit of Pluto; these are seen once and then disappear for millennia. However there are some which appear to us at regular intervals. For example the mo ...
the earth in space - North Salem Schools Teachers Module
... night relative to a fixed position on the Earth’s surface 1) there are 360 in a circle, it takes about 360 days to orbit the Sun, so there’s the 1 shift 2) it is revolution that accounts for us seeing different constellations during different seasons of the year since we are moving in space, we ha ...
... night relative to a fixed position on the Earth’s surface 1) there are 360 in a circle, it takes about 360 days to orbit the Sun, so there’s the 1 shift 2) it is revolution that accounts for us seeing different constellations during different seasons of the year since we are moving in space, we ha ...
speech on dark matter
... I have been studying Physics for approximately four months, and if I have learnt anything through my lectures and reading, it is that there are STILL some major problems with our comprehension of the universe that we exist in. Before my studies I (somewhat naively perhaps) assumed that after the exi ...
... I have been studying Physics for approximately four months, and if I have learnt anything through my lectures and reading, it is that there are STILL some major problems with our comprehension of the universe that we exist in. Before my studies I (somewhat naively perhaps) assumed that after the exi ...
Physical Cosmology
... • At z=1100 the Universe has cooled down to 3000K . Hydrogen becomes neutral (“Recombination”). • At z <~ 20 the “first” star (clusters)/small galaxies form. • At z ~ 6-10 these gradually photo-ionize the hydrogen in the IGM (“Reionization”). • At z<6 galaxies form most of their stars and grow by me ...
... • At z=1100 the Universe has cooled down to 3000K . Hydrogen becomes neutral (“Recombination”). • At z <~ 20 the “first” star (clusters)/small galaxies form. • At z ~ 6-10 these gradually photo-ionize the hydrogen in the IGM (“Reionization”). • At z<6 galaxies form most of their stars and grow by me ...
New Worlds - Universiteit Leiden
... which is half the mass of Jupiter, turned out not to be at a respectable distance from the star, but instead orbits very close to the star. Jupiter takes some twelve years to orbit our Sun; this exoplanet circles 51 Pegasi in just four days! Theoreticians had for decades come up with wonderful expla ...
... which is half the mass of Jupiter, turned out not to be at a respectable distance from the star, but instead orbits very close to the star. Jupiter takes some twelve years to orbit our Sun; this exoplanet circles 51 Pegasi in just four days! Theoreticians had for decades come up with wonderful expla ...
ppt - Faculty Virginia
... Planetary magnetic fields shield planets from the solar wind and cause energetic particles to interact with the planet's atmosphere causing auroral emission. ...
... Planetary magnetic fields shield planets from the solar wind and cause energetic particles to interact with the planet's atmosphere causing auroral emission. ...
You in Outer Space Curriculum Map
... change at various elevations. 2. Light energy moves in light waves from the Sun to other planets in the solar system. 3. It is believed that the universe began in a hot “big bang” and continues to expand. 4. Earth is one planet in a vast Solar System. 5. Our Solar System is just one member of a vast ...
... change at various elevations. 2. Light energy moves in light waves from the Sun to other planets in the solar system. 3. It is believed that the universe began in a hot “big bang” and continues to expand. 4. Earth is one planet in a vast Solar System. 5. Our Solar System is just one member of a vast ...
Bellringer - Madison County Schools
... • 13.75 billion years ago, the part of the universe we see now was no larger than the period at the end of this sentence. ...
... • 13.75 billion years ago, the part of the universe we see now was no larger than the period at the end of this sentence. ...
Practice Questions for Final
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
... A. The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real. B. Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter. C. During the first 0.001 second ...
"Dark Matter in the Milky Way - how to find it using Gaia and other
... On the scale of individual galaxies, agreement is less obvious. Things are more complicated, we have to consider the baryons! We should look at the galaxy we can study closest ...
... On the scale of individual galaxies, agreement is less obvious. Things are more complicated, we have to consider the baryons! We should look at the galaxy we can study closest ...
How the Universe reveals itself
... place of great turmoil, it is not a place of stagnation either. Even in this seemingly desolate space, many interactions occur, often in very significant ways. ...
... place of great turmoil, it is not a place of stagnation either. Even in this seemingly desolate space, many interactions occur, often in very significant ways. ...
Dark Matter in the Milky Way - how to find it using Gaia and other
... On the scale of individual galaxies, agreement is less obvious. Things are more complicated, we have to consider the baryons! We should look at the galaxy we can study closest ...
... On the scale of individual galaxies, agreement is less obvious. Things are more complicated, we have to consider the baryons! We should look at the galaxy we can study closest ...
Goaloneastronomystudent version
... supporting string is within the surface of the ball as shown. Add more clay as well as move the string along the skewer until this system balances. Note: The Skewer-Clay System should be able to swing freely as well as to rotate around the string. 4. Once the system is balanced on the string, push o ...
... supporting string is within the surface of the ball as shown. Add more clay as well as move the string along the skewer until this system balances. Note: The Skewer-Clay System should be able to swing freely as well as to rotate around the string. 4. Once the system is balanced on the string, push o ...
Unit 5 – Space Exploration - Buck Mountain Central School
... http://www.nas.nasa.gov/NAS/SpaceSettlement/ Telescopes allow us to see objects that are very distant in space. Optical Telescopes http://cdsweb.u-strasbg.fr/astroweb/optical.html In 1608, Hans Lippershey made one of the first telescopes – but it was Galileo Galilei who made practical use of it. The ...
... http://www.nas.nasa.gov/NAS/SpaceSettlement/ Telescopes allow us to see objects that are very distant in space. Optical Telescopes http://cdsweb.u-strasbg.fr/astroweb/optical.html In 1608, Hans Lippershey made one of the first telescopes – but it was Galileo Galilei who made practical use of it. The ...
The Interstellar Medium
... First idea was to have a debate on relativity: As to relativity, I must confess that I would rather have a subject in which there would be a half dozen members of the Academy competent enough to understand at least a few words of what the speakers were saying if we had a symposium upon it. I pray to ...
... First idea was to have a debate on relativity: As to relativity, I must confess that I would rather have a subject in which there would be a half dozen members of the Academy competent enough to understand at least a few words of what the speakers were saying if we had a symposium upon it. I pray to ...
Dark matter
... Only 20% of the dark matter is MACHOs: Some of the dark matter in galaxy “halos” consists of exotic matter. Suppose there existed a type of massive elementary particle that didn’t absorb, emit, or scatter photons. We’d detect such a particle only by its gravitational pull on luminous matter. ...
... Only 20% of the dark matter is MACHOs: Some of the dark matter in galaxy “halos” consists of exotic matter. Suppose there existed a type of massive elementary particle that didn’t absorb, emit, or scatter photons. We’d detect such a particle only by its gravitational pull on luminous matter. ...
Powerpoint
... C. Inflationary Theory - predicts that there was a sudden expansion when the universe was very young, more extreme than predicted by the big bang theory! • Considered to be a “revised” Big Bang theory • The universe expanded and cooled until about 10-35 second after the big bang when it became so ...
... C. Inflationary Theory - predicts that there was a sudden expansion when the universe was very young, more extreme than predicted by the big bang theory! • Considered to be a “revised” Big Bang theory • The universe expanded and cooled until about 10-35 second after the big bang when it became so ...
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.