navigation - Claire Lambe Home
... Pytheas pobably determined his course by throwing overboard a small log tied to a knotted line which as it drifted astern and the line was payed out, the number of knots, the number of knots that were payed out while an hourglass emptied gave the speed of the vessel. Mariners also used the log and l ...
... Pytheas pobably determined his course by throwing overboard a small log tied to a knotted line which as it drifted astern and the line was payed out, the number of knots, the number of knots that were payed out while an hourglass emptied gave the speed of the vessel. Mariners also used the log and l ...
3 Nightly Motions
... Stars move 1º in approximately 4 minutes 360º in 24 hours (approximately) = Definition of a Day Paving the way for us to all be stressed out about how much we have to do in a day!!! ...
... Stars move 1º in approximately 4 minutes 360º in 24 hours (approximately) = Definition of a Day Paving the way for us to all be stressed out about how much we have to do in a day!!! ...
Stellar Masses
... slightly higher in energy (5.9 x 10-6 eV ). Compare this with the binding energy of the 1s state = -13.6 eV Hydrogen in its ground state will absorb 21 cm. radiation. If it is already in the upper state it will radiate 21 cm. radiation, which penetrates the dust clouds in interstellar space. 21.1 cm ...
... slightly higher in energy (5.9 x 10-6 eV ). Compare this with the binding energy of the 1s state = -13.6 eV Hydrogen in its ground state will absorb 21 cm. radiation. If it is already in the upper state it will radiate 21 cm. radiation, which penetrates the dust clouds in interstellar space. 21.1 cm ...
“Mystery of the Missing Seasons” Available in
... in the case of Earth, the seasons) pass? They decide it would be a good idea to try. First the aliens set up a typical but speeded-up day on their planet--with alien setting, different-colored sky, and sun their crossing that sky. As their planet spins or rotates, the sun rises in the east crosses t ...
... in the case of Earth, the seasons) pass? They decide it would be a good idea to try. First the aliens set up a typical but speeded-up day on their planet--with alien setting, different-colored sky, and sun their crossing that sky. As their planet spins or rotates, the sun rises in the east crosses t ...
XI. Astronomy: Solar-System Debris and Comets
... two lumpy, cratered rocks stuck together. Roughly 4 X 7 km in size, it is the slowest-rotating meteoroid known, taking about 10-11 days to make one turn. ...
... two lumpy, cratered rocks stuck together. Roughly 4 X 7 km in size, it is the slowest-rotating meteoroid known, taking about 10-11 days to make one turn. ...
May 2016 - Newbury Astronomical Society
... telescope, will also detrimentally affect the image. main areas where Atmospheric turbulence occurs. Near Using a cheap low quality eyepiece will also reduce the the ground seeing (0 to 100metres) central troposphere quality of the image. Even good optics cannot produce (100m – 2km) and High troposp ...
... telescope, will also detrimentally affect the image. main areas where Atmospheric turbulence occurs. Near Using a cheap low quality eyepiece will also reduce the the ground seeing (0 to 100metres) central troposphere quality of the image. Even good optics cannot produce (100m – 2km) and High troposp ...
Proxima b
... surface. Assuming that Proxima b reflects as much starlight as Earth does, it would have a global mean surface temperature (GMST) of 233 K. That’s minus 40 ºC, too cold for liquid water and possibly for life. But without the natural greenhouse effect provided by our atmosphere, Earth would have a GM ...
... surface. Assuming that Proxima b reflects as much starlight as Earth does, it would have a global mean surface temperature (GMST) of 233 K. That’s minus 40 ºC, too cold for liquid water and possibly for life. But without the natural greenhouse effect provided by our atmosphere, Earth would have a GM ...
Earth_Science - Gorman Learning Center
... reactions, primarily the fusion of hydrogen to form helium. Students know the evidence for the dramatic effects that asteroid impacts have had in shaping the surface of planets and their moons and in mass extinctions of life on Earth. * Students know the evidence for the existence of planets orbitin ...
... reactions, primarily the fusion of hydrogen to form helium. Students know the evidence for the dramatic effects that asteroid impacts have had in shaping the surface of planets and their moons and in mass extinctions of life on Earth. * Students know the evidence for the existence of planets orbitin ...
Physics Today - Earth, Environmental and Planetary Sciences
... debris from impacts between those early-forming planetesimals. The oldest meteorites are found to be about 4.568 billion years in age. We also have strong theoretical reasons to suspect that somewhat larger bodies—perhaps of a size the order of Earth’s moon but up to and including the size of Mars— ...
... debris from impacts between those early-forming planetesimals. The oldest meteorites are found to be about 4.568 billion years in age. We also have strong theoretical reasons to suspect that somewhat larger bodies—perhaps of a size the order of Earth’s moon but up to and including the size of Mars— ...
Your Guide to the Universe
... to be the brightest object in our Solar System and naturally we are really curious to know more about it. The Sun’s heat and light provide the energy for life to exist on Earth. The Sun is a giant ball of extremely hot hydrogen and helium gases, nearly 150 million kilometres away. It is gigantic com ...
... to be the brightest object in our Solar System and naturally we are really curious to know more about it. The Sun’s heat and light provide the energy for life to exist on Earth. The Sun is a giant ball of extremely hot hydrogen and helium gases, nearly 150 million kilometres away. It is gigantic com ...
Teacher Guide pages
... whether Jupiter could have been much hotter earlier in its history. Another reason for speculation about Jupiter is its large number of moons. Asteroids, Comets, and Meteors Small Solar System Bodies (SSSB) are objects in the solar system that are neither planets or dwarf planets. Of these, asteroid ...
... whether Jupiter could have been much hotter earlier in its history. Another reason for speculation about Jupiter is its large number of moons. Asteroids, Comets, and Meteors Small Solar System Bodies (SSSB) are objects in the solar system that are neither planets or dwarf planets. Of these, asteroid ...
The Natural Clock
... other natural clocks. Because the Zodiac works, it is still being used. Because radioactive dating is unreliable, the only thing it is used for is proving the earth is very old. However, Science does not give us a way to prove the age of the earth. In other words, we have no way to repeat or prove t ...
... other natural clocks. Because the Zodiac works, it is still being used. Because radioactive dating is unreliable, the only thing it is used for is proving the earth is very old. However, Science does not give us a way to prove the age of the earth. In other words, we have no way to repeat or prove t ...
Study Guide Ch10,11 and 12
... 8. Be able to identify a galaxy by its shape, according to the Hubble sequence. 9. Compare and contrast elliptical galaxies and spiral galaxies. 10. Describe the different types of active galaxies, and the mechanisms proposed to explain their energy output and other characteristics. 11. Briefly rela ...
... 8. Be able to identify a galaxy by its shape, according to the Hubble sequence. 9. Compare and contrast elliptical galaxies and spiral galaxies. 10. Describe the different types of active galaxies, and the mechanisms proposed to explain their energy output and other characteristics. 11. Briefly rela ...
D1 Stellar quantities (PPT)
... ▪ Initially the cloud was about several light years across. A small overdensity in the cloud caused the contraction to begin and the overdensity to grow, thus producing a faster contraction ▪ Initially, most of the motions of the cloud particles were random, yet the nebula had a net rotation. As col ...
... ▪ Initially the cloud was about several light years across. A small overdensity in the cloud caused the contraction to begin and the overdensity to grow, thus producing a faster contraction ▪ Initially, most of the motions of the cloud particles were random, yet the nebula had a net rotation. As col ...
Atmospheric biomarkers on terrestrial exoplanets Abstract Introduction
... by ancient Greek philosophers, has been proved only very recently, first around pulsars (Wolszczan & Frail 1992), then around solar type stars (Mayor & Queloz 1995). In the latter case, the planets discovered are giant planets (of the order of Jupiter’s mass) and likely to be gaseous, which proved t ...
... by ancient Greek philosophers, has been proved only very recently, first around pulsars (Wolszczan & Frail 1992), then around solar type stars (Mayor & Queloz 1995). In the latter case, the planets discovered are giant planets (of the order of Jupiter’s mass) and likely to be gaseous, which proved t ...
Which of the following is the best description of an Sc galaxy? A) a
... The Virgo Cluster of galaxies is receding from us at about 1500 km/sec. How does its distance compare with the diameter of the Milky Way galaxy? A) its distance is about ten times the diameter of the Milky Way B) its distance is about 50 times the diameter of the Milky Way C) its distance is about 5 ...
... The Virgo Cluster of galaxies is receding from us at about 1500 km/sec. How does its distance compare with the diameter of the Milky Way galaxy? A) its distance is about ten times the diameter of the Milky Way B) its distance is about 50 times the diameter of the Milky Way C) its distance is about 5 ...
Feb 2017 - What`s Out Tonight?
... The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great examples. cury, Venus, Mars, Jupiter and Saturn. Venus is ext ...
... The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great examples. cury, Venus, Mars, Jupiter and Saturn. Venus is ext ...
Sky Notes - February 2012 - North Devon Astronomical Society
... objects. The first of these is VY Canis Majoris which is, in terms of radius, the largest star known. It’s brightness is somewhat variable, but with an average magnitude of +7.8, it is visible in binoculars and small telescopes. In addition, the constellation also contains the recently discovered Ca ...
... objects. The first of these is VY Canis Majoris which is, in terms of radius, the largest star known. It’s brightness is somewhat variable, but with an average magnitude of +7.8, it is visible in binoculars and small telescopes. In addition, the constellation also contains the recently discovered Ca ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.