Geo-centric astronomy from Pythagoras to Ptolemy File
... were actually combinations of simple circular motions, and challenged his Athenian colleagues to prove it. In fact, Plato challenged his students at the Academy to come up with ideas that could describe the zig-zag motion in terms of circles. He wanted his students to go behind the appearance to fin ...
... were actually combinations of simple circular motions, and challenged his Athenian colleagues to prove it. In fact, Plato challenged his students at the Academy to come up with ideas that could describe the zig-zag motion in terms of circles. He wanted his students to go behind the appearance to fin ...
13 - Joe Griffin Media Ministries
... direct, or prograde, motion. They wander across the sky westward, but since the orbit of Earth is much faster than those of the superior or outer planets, this causes periodic retrogradation. For example, Earth advances on Jupiter, draws even with it, and then passes it. This causes an optical illus ...
... direct, or prograde, motion. They wander across the sky westward, but since the orbit of Earth is much faster than those of the superior or outer planets, this causes periodic retrogradation. For example, Earth advances on Jupiter, draws even with it, and then passes it. This causes an optical illus ...
The Planets Testify of the Creator
... These two periods can be very different. For example, consider the planet Venus. It orbits the sun 13 times while the earth orbits the sun 8 times, that is, in 8 years. Thus, it's sidereal period is 8/13 of a year, or about 225 days. But suppose we ask, "How many times will Venus appear to rise with ...
... These two periods can be very different. For example, consider the planet Venus. It orbits the sun 13 times while the earth orbits the sun 8 times, that is, in 8 years. Thus, it's sidereal period is 8/13 of a year, or about 225 days. But suppose we ask, "How many times will Venus appear to rise with ...
unit a assessment 2 - d
... d) identify several different instruments astronomers use to study the universe and what the instruments tell us (DOK 1) e) gather information from multiple resources to make connections between the instruments scientists use to study the universe and what they learn about the universe using the ins ...
... d) identify several different instruments astronomers use to study the universe and what the instruments tell us (DOK 1) e) gather information from multiple resources to make connections between the instruments scientists use to study the universe and what they learn about the universe using the ins ...
Lecture9_2014_v2 - UCO/Lick Observatory
... too little material for rock – Do they form outside frost line and migrate inwards? » planet forms in gas/dust disc around star » drag from remaining gas/dust causes it to spiral inwards » or scattering from other giant planets causes migration » why does it stop? ...
... too little material for rock – Do they form outside frost line and migrate inwards? » planet forms in gas/dust disc around star » drag from remaining gas/dust causes it to spiral inwards » or scattering from other giant planets causes migration » why does it stop? ...
Great Observatories Origins Deep Survey (GOODS) Observation
... well as the state of current research so that if you choose astronomy as a profession, you know what is going on in today’s research (at least in extragalactic astronomy). It probably is the first time you are exposed to what is currently going on in astronomy. • While the course covers both theoret ...
... well as the state of current research so that if you choose astronomy as a profession, you know what is going on in today’s research (at least in extragalactic astronomy). It probably is the first time you are exposed to what is currently going on in astronomy. • While the course covers both theoret ...
Introducing Astronomy
... observed conditions in a laboratory setting Sometimes very difficult Extreme temperatures Complete vacuum Intense radiation ...
... observed conditions in a laboratory setting Sometimes very difficult Extreme temperatures Complete vacuum Intense radiation ...
Document
... • Here is the “Big Dipper”, which is not an “official” constellation but part of a larger one. • Again, the stars are usually not physically associated with each other. ...
... • Here is the “Big Dipper”, which is not an “official” constellation but part of a larger one. • Again, the stars are usually not physically associated with each other. ...
Here
... • Here is the “Big Dipper”, which is not an “official” constellation but part of a larger one. • Again, the stars are usually not physically associated with each other. ...
... • Here is the “Big Dipper”, which is not an “official” constellation but part of a larger one. • Again, the stars are usually not physically associated with each other. ...
What causes eclipses?
... small to notice with the naked eye. 2. Earth does not orbit the Sun; it is the center of the universe. With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away. Thus, the stage was set for the long, histori ...
... small to notice with the naked eye. 2. Earth does not orbit the Sun; it is the center of the universe. With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away. Thus, the stage was set for the long, histori ...
Ice Giant Neptune Frontlines Potentially Hazardous Asteroid
... to further improve the asteroid’s orbital information. ...
... to further improve the asteroid’s orbital information. ...
Parallax and Its role In the helIocentrIc/GeocentrIc debate
... Your finger is like a nearby star, and the far wall is like the distant stars in the background. Your two eyes are like a telescope on Earth that is in two different positions as the Earth moves around the Sun. For example, in April a nearby star appears in one location (like looking through one eye ...
... Your finger is like a nearby star, and the far wall is like the distant stars in the background. Your two eyes are like a telescope on Earth that is in two different positions as the Earth moves around the Sun. For example, in April a nearby star appears in one location (like looking through one eye ...
ppt
... Doppler technique (on current telescopes) will never find Earth-like planets: their velocity wobbles are simply too low We need different techniques: we have discussed two already that should yield Earth-size planets: transits and microlensing -- lots of ground-based programs at the moment Space-bas ...
... Doppler technique (on current telescopes) will never find Earth-like planets: their velocity wobbles are simply too low We need different techniques: we have discussed two already that should yield Earth-size planets: transits and microlensing -- lots of ground-based programs at the moment Space-bas ...
Formation of the Solar System
... – Ices don't condense inside orbit of Mars: – Terrestrial planetesimals mostly rock, metals; not very massive – Jovian planetesimals mostly Icy materials + rock; much more massive ...
... – Ices don't condense inside orbit of Mars: – Terrestrial planetesimals mostly rock, metals; not very massive – Jovian planetesimals mostly Icy materials + rock; much more massive ...
Chapter 4 - Pierce Public Schools
... 158. Convective zone-- region in sun where gases transfer energy 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone- ...
... 158. Convective zone-- region in sun where gases transfer energy 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone- ...
Chapter 4 - Pierce Public Schools
... 158. Convective zone-- region in sun where gases transfer energy 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone- ...
... 158. Convective zone-- region in sun where gases transfer energy 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone- ...
Chapter 4 - Pierce Public Schools
... 158. Convective zone-- region in sun where gases transfer energy 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone- ...
... 158. Convective zone-- region in sun where gases transfer energy 159. Corona-- outer layer of sun 160. Nebular theory-- explains how the sun and planets were formed 161. Photosphere-- surface of sun 162. Prominence-- cloud of glowing gases that arches high above the sun’ surface 163. Radiative zone- ...
PeGASus Newsletter Issue #68 – Oct. 1996
... grouping of 18 gigantic star clusters that appear to be the same distance from Earth, and close enough to each other that they will eventually merge into a few galaxy-sized objects. They are so far away, 11 billion light-years, that they existed during the epoch when it is commonly believed galaxies ...
... grouping of 18 gigantic star clusters that appear to be the same distance from Earth, and close enough to each other that they will eventually merge into a few galaxy-sized objects. They are so far away, 11 billion light-years, that they existed during the epoch when it is commonly believed galaxies ...
Document
... Any theory put forward to explain the formation of our solar system must be able to explain the following observable features: •The orbits of the planets are all direct (i.e., move in a counter-clockwise direction when viewed from the north pole of the solar system) and close to circular. Exceptions ...
... Any theory put forward to explain the formation of our solar system must be able to explain the following observable features: •The orbits of the planets are all direct (i.e., move in a counter-clockwise direction when viewed from the north pole of the solar system) and close to circular. Exceptions ...
astronomy ch 2 - Fort Thomas Independent Schools
... the scientific revolution that dethroned Earth from its location at the center of the universe Copernicus’s argument that the planets orbit the Sun why the direction of motion of the planets on the celestial sphere sometimes appears to change that Kepler’s determination of the shapes of planetary or ...
... the scientific revolution that dethroned Earth from its location at the center of the universe Copernicus’s argument that the planets orbit the Sun why the direction of motion of the planets on the celestial sphere sometimes appears to change that Kepler’s determination of the shapes of planetary or ...
Slide 1
... Exoplanet surveys • Exoplanetary microlensing is a low probability phenomenon. • In order to monitor many potential events, we need — A Wide-field survey — Pointed at a region that is dense in stars, e.g. the galactic bulge ...
... Exoplanet surveys • Exoplanetary microlensing is a low probability phenomenon. • In order to monitor many potential events, we need — A Wide-field survey — Pointed at a region that is dense in stars, e.g. the galactic bulge ...
1 light year = 9 x 10 12 km
... – 8 years to reach us from Sirius (8 light-years away) – 1,500 years to reach us from the Orion Nebula ...
... – 8 years to reach us from Sirius (8 light-years away) – 1,500 years to reach us from the Orion Nebula ...
Test - Hampton Science 8A 8B 8C 8D 8E Stars are classified on the
... Many stars a lot closer to Earth than 40 light years so their light waves will reach Earth faster than the Sun. The absolute magnitude of a star that is 40 light years away would be very dim to the people on Earth. All stars are 40 light years away because their sizes, in the sky, are all the same a ...
... Many stars a lot closer to Earth than 40 light years so their light waves will reach Earth faster than the Sun. The absolute magnitude of a star that is 40 light years away would be very dim to the people on Earth. All stars are 40 light years away because their sizes, in the sky, are all the same a ...
Astrobiology
Astrobiology is the study of the origin, evolution, distribution, and future of life in the universe: extraterrestrial life and life on Earth. This interdisciplinary field encompasses the search for habitable environments in our Solar System and habitable planets outside our Solar System, the search for evidence of prebiotic chemistry, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in outer space. Astrobiology addresses the question of whether life exists beyond Earth, and how humans can detect it if it does. (The term exobiology is similar but more specific—it covers the search for life beyond Earth, and the effects of extraterrestrial environments on living things.)Astrobiology makes use of physics, chemistry, astronomy, biology, molecular biology, ecology, planetary science, geography, and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from the biosphere on Earth. The origin and early evolution of life is an inseparable part of the discipline of astrobiology. Astrobiology concerns itself with interpretation of existing scientific data; given more detailed and reliable data from other parts of the universe, the roots of astrobiology itself—physics, chemistry and biology—may have their theoretical bases challenged. Although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. According to research published in August 2015, very large galaxies may be more favorable to the creation and development of habitable planets than smaller galaxies, like the Milky Way galaxy. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently.Current studies on the planet Mars by the Curiosity and Opportunity rovers are now searching for evidence of ancient life as well as plains related to ancient rivers or lakes that may have been habitable. The search for evidence of habitability, taphonomy (related to fossils), and organic molecules on the planet Mars is now a primary NASA objective on Mars.