The 22 First Magnitude Stars
... Equatorial Coordinate System • Polar coordinate system, equivalent to geographic coordinate system • Celestial poles aligned with geographic poles of the Earth’s rotation • Independent of local latitude/longitude ...
... Equatorial Coordinate System • Polar coordinate system, equivalent to geographic coordinate system • Celestial poles aligned with geographic poles of the Earth’s rotation • Independent of local latitude/longitude ...
The universe is faster, colder, and wackier than anything we can
... with their feeble gravity and take up a fragile orbit around each other. Of the many binary pairs of small galaxies we know of, the pair that is bound together most weakly is an obscure duo known as SDSS J113342.7+482004.9 and SDSS J113403.9+482837.4, or as I like to call them, Napoleon and Josephin ...
... with their feeble gravity and take up a fragile orbit around each other. Of the many binary pairs of small galaxies we know of, the pair that is bound together most weakly is an obscure duo known as SDSS J113342.7+482004.9 and SDSS J113403.9+482837.4, or as I like to call them, Napoleon and Josephin ...
Astrophysics
... Red supergiants are among the most largest of stars in the Universe and are major contributors of heavy elements to the interstellar medium. Their immense mass-loss rates (up to 10 orders of magnitude greater than the solar value) play a key role in galactic chemical evolution but represent a challe ...
... Red supergiants are among the most largest of stars in the Universe and are major contributors of heavy elements to the interstellar medium. Their immense mass-loss rates (up to 10 orders of magnitude greater than the solar value) play a key role in galactic chemical evolution but represent a challe ...
December
... Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located off-center. Although somewhat flattened, and thus more elliptical than circular, the figure is so huge that it is impossible to take it all in at a single glance, thus making the l ...
... Procyon, Pollux - toss in 2nd magnitude Castor - Capella, Aldebaran, and Rigel on the periphery, and Betelgeuse located off-center. Although somewhat flattened, and thus more elliptical than circular, the figure is so huge that it is impossible to take it all in at a single glance, thus making the l ...
astronomy - Jiri Brezina Teaching
... PHYSICS (Greek: physis = nature), NCE: branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th century, and is still known by this name at a few universities. Physics is in some senses the oldest and ...
... PHYSICS (Greek: physis = nature), NCE: branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th century, and is still known by this name at a few universities. Physics is in some senses the oldest and ...
January 2007 - Western Nevada Astronomical Society
... September, within the same evening, I saw the calculated steadiness of a globular cluster along side the excited, youthful caprice of an open cluster. No amount of reading can really create the same impression. Having seen them with my own eyes, learning about them later on became enhanced, even tho ...
... September, within the same evening, I saw the calculated steadiness of a globular cluster along side the excited, youthful caprice of an open cluster. No amount of reading can really create the same impression. Having seen them with my own eyes, learning about them later on became enhanced, even tho ...
The Interstellar Medium and Star Formation
... pebbles, then rocks, then boulders, then planetesimals, then planets. Some planets become massive enough to also accumulate Hydrogen and Helium gas. • However, during and after formation, it seems that some planets are able to migrate in their disks, drifting inwards to settle close to the star. We ...
... pebbles, then rocks, then boulders, then planetesimals, then planets. Some planets become massive enough to also accumulate Hydrogen and Helium gas. • However, during and after formation, it seems that some planets are able to migrate in their disks, drifting inwards to settle close to the star. We ...
Stars - Stallion Science
... • Hydrogen nuclei started to form but it was still too hot for atoms to be stable • About 380,000 years after the big bang is when electrons could combine with atomic nuclei to form atoms • The first stars were born about 400 million years after the big bang ...
... • Hydrogen nuclei started to form but it was still too hot for atoms to be stable • About 380,000 years after the big bang is when electrons could combine with atomic nuclei to form atoms • The first stars were born about 400 million years after the big bang ...
A Human-Powered Orrery: Connecting Learners with the Night Sky*
... available (See Fig. 3). The largest, and heaviest uses aluminum pie pans (See Fig. 3 and Fig. 7, page 11). This can take as long as 45 minutes to set up, similar to the one in the YouTube video. We have used this only when we have extra time such as an overnight with lots of help. However, this mo ...
... available (See Fig. 3). The largest, and heaviest uses aluminum pie pans (See Fig. 3 and Fig. 7, page 11). This can take as long as 45 minutes to set up, similar to the one in the YouTube video. We have used this only when we have extra time such as an overnight with lots of help. However, this mo ...
planetary temperatures, albedos, and the greenhouse effect
... Part II. Adding Albedo to the Model Albedo (represented by the symbol A) is the fraction of sunlight falling on a surface that is reflected back into space. (The word albedo comes from the Latin word for "white" - albus.) The albedo represents the average reflectivity over the entire visible surface ...
... Part II. Adding Albedo to the Model Albedo (represented by the symbol A) is the fraction of sunlight falling on a surface that is reflected back into space. (The word albedo comes from the Latin word for "white" - albus.) The albedo represents the average reflectivity over the entire visible surface ...
Stars
... It is more massive and brighter than about 85% of the stars. That’s because the most common stars are red dwarfs, which are small dim stars. Most of the stars we can see in the night sky, however, are brighter and larger that the sun. Because they are so far away, they must be large and brig ...
... It is more massive and brighter than about 85% of the stars. That’s because the most common stars are red dwarfs, which are small dim stars. Most of the stars we can see in the night sky, however, are brighter and larger that the sun. Because they are so far away, they must be large and brig ...
ASTR 314 : Survey of Astronomy Extragalactic Astronomy
... Royal Society sponsored an exhibition in 1768 to Tahiti to measure Venus’ transit of the Sun. This led to a measurement of the AU within 10% of the present-day value. Subsequent observations of Mars, Venus, and asteroids confirmed and refined this measurement. Humanity now had a yardstick for the A ...
... Royal Society sponsored an exhibition in 1768 to Tahiti to measure Venus’ transit of the Sun. This led to a measurement of the AU within 10% of the present-day value. Subsequent observations of Mars, Venus, and asteroids confirmed and refined this measurement. Humanity now had a yardstick for the A ...
The Helix Nebula • NGC 7293
... The colorful end of a star’s life This “tie-dye” portrait offers a view down a trillion-mile-long tunnel of glowing gases that were ejected during the final years of an aging star. The glowing cloud, called the Helix Nebula, looks like a bubble in this Hubble Space Telescope image. Astronomers, howe ...
... The colorful end of a star’s life This “tie-dye” portrait offers a view down a trillion-mile-long tunnel of glowing gases that were ejected during the final years of an aging star. The glowing cloud, called the Helix Nebula, looks like a bubble in this Hubble Space Telescope image. Astronomers, howe ...
13_Testbank - Lick Observatory
... planetary systems exist. Indeed, the statistics show that planet formation appears to be rather common. The fact that we find giant Jupiter-like planets very close to the stars demonstrates, however, that planets can move considerable distances from their birthplaces as they interact with the protos ...
... planetary systems exist. Indeed, the statistics show that planet formation appears to be rather common. The fact that we find giant Jupiter-like planets very close to the stars demonstrates, however, that planets can move considerable distances from their birthplaces as they interact with the protos ...
Excerpts - Solar and Sidereal Time
... revolution in its orbit. * If one clock should be so well regulated as to show the time to be XII at noon this day, and on the 365th day afterward; and another clock should be so well regulated as to show the time to be XII every day or night when any given star is on the meridian, the latter clock ...
... revolution in its orbit. * If one clock should be so well regulated as to show the time to be XII at noon this day, and on the 365th day afterward; and another clock should be so well regulated as to show the time to be XII every day or night when any given star is on the meridian, the latter clock ...
The Death of a Low Mass Star
... – looking through a greater depth of material at the edges Core of “dead” star ...
... – looking through a greater depth of material at the edges Core of “dead” star ...
C. isolated
... 43. Solar winds pass the Earth at an average speed of 400 km/s. This protects us from the devastating effects of the solar winds … A. Earth’s ozone B. Earth’s gravity C. Earth’s atmosphere D. Earth’s magnetic field 44. To locate an object in the sky, two questions must be solved. How high is it in t ...
... 43. Solar winds pass the Earth at an average speed of 400 km/s. This protects us from the devastating effects of the solar winds … A. Earth’s ozone B. Earth’s gravity C. Earth’s atmosphere D. Earth’s magnetic field 44. To locate an object in the sky, two questions must be solved. How high is it in t ...
Other Planetary Systems The New Science of Distant Worlds 13.1
... planetary systems exist. Indeed, the statistics show that planet formation appears to be rather common. The fact that we find giant Jupiter-like planets very close to the stars demonstrates, however, that planets can move considerable distances from their birthplaces as they interact with the protos ...
... planetary systems exist. Indeed, the statistics show that planet formation appears to be rather common. The fact that we find giant Jupiter-like planets very close to the stars demonstrates, however, that planets can move considerable distances from their birthplaces as they interact with the protos ...
W > 1 - The Open University
... Test your eyesight from a dark site by counting the number of naked eye stars that are visible. Seven should readily be seen. Keen vision will lead you into double figures. A test for moderate apertures is the nebulosity around some of the other brighter stars of the group, especially Merope. Nebula ...
... Test your eyesight from a dark site by counting the number of naked eye stars that are visible. Seven should readily be seen. Keen vision will lead you into double figures. A test for moderate apertures is the nebulosity around some of the other brighter stars of the group, especially Merope. Nebula ...
The sun is a star.
... -Light travels at the speed of about 300,000 km per second. Yet, even with this speed, the light of the sun takes about eight minutes to reach the earth. -Neil Armstrong was the first man to step on the surface of the moon on 21 July 1969. -Our earth has only one satellite, that is, the moon. -Moon ...
... -Light travels at the speed of about 300,000 km per second. Yet, even with this speed, the light of the sun takes about eight minutes to reach the earth. -Neil Armstrong was the first man to step on the surface of the moon on 21 July 1969. -Our earth has only one satellite, that is, the moon. -Moon ...
Chapter 9
... matches that of Uranus. Neptune’s color is also blue (because of methane in its upper atmosphere). 3. Unlike the nearly featureless Uranus, Neptune exhibits weather patterns in its atmosphere. It has parallel bands around it and its Great Dark Spot (photographed by Voyager 2) is similar in appearanc ...
... matches that of Uranus. Neptune’s color is also blue (because of methane in its upper atmosphere). 3. Unlike the nearly featureless Uranus, Neptune exhibits weather patterns in its atmosphere. It has parallel bands around it and its Great Dark Spot (photographed by Voyager 2) is similar in appearanc ...
Astronomy Fall 2013 Final Exam History of Astronomy Know: speed
... Dopler effect from a moving object giving off light; red wavelenths are longer so the light is stretched meaning the object is moving awayfrom the observer. Blue wavelengths are shortened so the object is moving towards the observer (coming at you) 3. What is the difference between apparent and abso ...
... Dopler effect from a moving object giving off light; red wavelenths are longer so the light is stretched meaning the object is moving awayfrom the observer. Blue wavelengths are shortened so the object is moving towards the observer (coming at you) 3. What is the difference between apparent and abso ...
The Stars Tonight
... • Prevailing dogma held that the Earth was the Center of All Things in the Universe, including motion. Galileo discovered that Jupiter has four large moons orbiting it (to this day they are collectively known as the Galilean Satellites!), thereby disproving another part of the “conventional wisdom.” ...
... • Prevailing dogma held that the Earth was the Center of All Things in the Universe, including motion. Galileo discovered that Jupiter has four large moons orbiting it (to this day they are collectively known as the Galilean Satellites!), thereby disproving another part of the “conventional wisdom.” ...
Mass extinctions and supernova explosions
... highly intensive gamma ray bursts (GRBs), which could be connected to SNe, initiated further discussions on possible life-threatening events in Earth’s history. The probability that GRBs hit the Earth is very low. Nevertheless, a past interaction of Earth with GRBs and/or SNe cannot be excluded and ...
... highly intensive gamma ray bursts (GRBs), which could be connected to SNe, initiated further discussions on possible life-threatening events in Earth’s history. The probability that GRBs hit the Earth is very low. Nevertheless, a past interaction of Earth with GRBs and/or SNe cannot be excluded and ...
Where are small bodies in the solar system?
... A sand grain- to boulder-sized rocky body that travels through space is a meteoroid. A bright streak of light that results when a meteoroid burns up in Earth’s atmosphere is called a meteor. A meteorite is a meteoroid that reaches Earth’s surface without burning up. ...
... A sand grain- to boulder-sized rocky body that travels through space is a meteoroid. A bright streak of light that results when a meteoroid burns up in Earth’s atmosphere is called a meteor. A meteorite is a meteoroid that reaches Earth’s surface without burning up. ...
Extraterrestrial life
Extraterrestrial life is life that does not originate from Earth. It is also called alien life, or, if it is a sentient and/or relatively complex individual, an ""extraterrestrial"" or ""alien"" (or, to avoid confusion with the legal sense of ""alien"", a ""space alien""). These as-yet-hypothetical life forms range from simple bacteria-like organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, so far no unambiguous evidence for its existence exists.The science of extraterrestrial life is known as exobiology. The science of astrobiology also considers life on Earth as well, and in the broader astronomical context. Meteorites that have fallen to Earth have sometimes been examined for signs of microscopic extraterrestrial life. Since the mid-20th century, there has been an ongoing search for signs of extraterrestrial intelligence, from radios used to detect possible extraterrestrial signals, to telescopes used to search for potentially habitable extrasolar planets. It has also played a major role in works of science fiction. Over the years, science fiction works, especially Hollywood's involvement, has increased the public's interest in the possibility of extraterrestrial life. Some encourage aggressive methods to try to get in contact with life in outer space, whereas others argue that it might be dangerous to actively call attention to Earth.