A Sun-Centered Universe - Sierra College Astronomy Home Page
... and make the uniform circular motion Model relative to another point, equally offset from center called the equant It is difficult to know whether Ptolemy believed the universe actually worked this way, or was this simply a model that gave fairly accurate predictions. D-7 ...
... and make the uniform circular motion Model relative to another point, equally offset from center called the equant It is difficult to know whether Ptolemy believed the universe actually worked this way, or was this simply a model that gave fairly accurate predictions. D-7 ...
6 March 2013 Exoplanets and Where to Find Them Professor
... images finally detected a point source in this clear zone. Over time this was observed to move relative to the disc, but aligned within it at a projected distance of 8-15 AU from its star (comparable to the orbit of Saturn in our solar system). This has been interpreted as a giant planet orbiting β ...
... images finally detected a point source in this clear zone. Over time this was observed to move relative to the disc, but aligned within it at a projected distance of 8-15 AU from its star (comparable to the orbit of Saturn in our solar system). This has been interpreted as a giant planet orbiting β ...
The Celestial Sphere - Department of Physics and Astronomy
... Measuring the Distance to Stars: Parallax The most distant parallaxes can be measured by satellites The Hipparcos satellite could measure parallaxes as small as 0.001 arcsecond ...
... Measuring the Distance to Stars: Parallax The most distant parallaxes can be measured by satellites The Hipparcos satellite could measure parallaxes as small as 0.001 arcsecond ...
8-4.5 - S2TEM Centers SC
... angles (closer to 90 degrees) and more daylight hours causes the hemisphere of Earth tilted toward the Sun to have warmer temperatures. The combination of indirect rays from the Sun that strike Earth at lower angles and less hours of daylight in the hemisphere of Earth angled away from the Sun hav ...
... angles (closer to 90 degrees) and more daylight hours causes the hemisphere of Earth tilted toward the Sun to have warmer temperatures. The combination of indirect rays from the Sun that strike Earth at lower angles and less hours of daylight in the hemisphere of Earth angled away from the Sun hav ...
4-3 Astronomy
... and light for Earth but did not study the cause for this. In the 8th grade (8-4.2,3) students will study the characteristics and features of the Sun more fully as it affects Earth including the effects of solar radiation, solar flares, and solar wind. It is essential for students to know that the Su ...
... and light for Earth but did not study the cause for this. In the 8th grade (8-4.2,3) students will study the characteristics and features of the Sun more fully as it affects Earth including the effects of solar radiation, solar flares, and solar wind. It is essential for students to know that the Su ...
Assignment Worksheet
... about 0.13 arcseconds/year. The Big Dipper is about 25 degrees across on the sky. How long should it take for this star to cross the Big Dipper as seen from Earth (pick the closest answer)? a) b) c) d) ...
... about 0.13 arcseconds/year. The Big Dipper is about 25 degrees across on the sky. How long should it take for this star to cross the Big Dipper as seen from Earth (pick the closest answer)? a) b) c) d) ...
the Scientific Revolution - Kapteyn Astronomical Institute
... corresponding to the six known planets ...
... corresponding to the six known planets ...
S T A R S
... about 68 light years away. Aldebaran is one of the few first magnitude stars that may be occulted by the moon. The disappearance of the star is startlingly abrupt, particularly so at the moons dark edge. The V shaped central group is the Hyades star cluster group and represents the bull’s head – Ald ...
... about 68 light years away. Aldebaran is one of the few first magnitude stars that may be occulted by the moon. The disappearance of the star is startlingly abrupt, particularly so at the moons dark edge. The V shaped central group is the Hyades star cluster group and represents the bull’s head – Ald ...
mam.evolution
... Why are high temperatures needed for nuclear fusion? a) electrons must be moving quickly to change orbitals b) the high temperature is necessary to fully cook the new ...
... Why are high temperatures needed for nuclear fusion? a) electrons must be moving quickly to change orbitals b) the high temperature is necessary to fully cook the new ...
A Triple Conjunction
... as was the massing of Jupiter, Saturn and Mars which followed, but the Babylonian records give no sign that they found the phenomenon of any special interest. An occultation A recent and interesting suggestion is that the Star of Bethlehem might have been an occultation. At first sight this seems un ...
... as was the massing of Jupiter, Saturn and Mars which followed, but the Babylonian records give no sign that they found the phenomenon of any special interest. An occultation A recent and interesting suggestion is that the Star of Bethlehem might have been an occultation. At first sight this seems un ...
Probing the Atmospheres of Exoplanets
... The discovery of methane on HD 189733b is, however, not without mystery. In our solar system, methane is not seen in the hot atmosphere of Venus, but only in those planetary atmospheres much colder than Earth’s. Most astronomers expected a hot planet such as this one to produce carbon monoxide, not ...
... The discovery of methane on HD 189733b is, however, not without mystery. In our solar system, methane is not seen in the hot atmosphere of Venus, but only in those planetary atmospheres much colder than Earth’s. Most astronomers expected a hot planet such as this one to produce carbon monoxide, not ...
Communication with Extraterrestrial Intelligence (CETI)
... belief systems and without risking their lives. A good place to keep track of the latest planet discoveries is the interactive catalog of the Extrasolar Planet Encyclopedia Web site. At a glance you
will be able to see how many new planets have been announced in the ...
... belief systems and without risking their lives. A good place to keep track of the latest planet discoveries is the interactive catalog of the Extrasolar Planet Encyclopedia Web site
galaxy - 106Thursday130-430
... The disk (containing the spiral arms), 2) The halo, and 3) The nucleus or central bulge. The halo and the nucleus are also referred to collectively as the spherical distribution component of the galaxy. ...
... The disk (containing the spiral arms), 2) The halo, and 3) The nucleus or central bulge. The halo and the nucleus are also referred to collectively as the spherical distribution component of the galaxy. ...
Volcanoes and Igneous Activity Earth - Chapter 4
... • Red giant collapses • Planetary nebula forms • Becomes a white dwarf ...
... • Red giant collapses • Planetary nebula forms • Becomes a white dwarf ...
Habitability: Good, Bad and the Ugly
... Habitability Zone in Our Galaxy • Other factors also relevant – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (M- ...
... Habitability Zone in Our Galaxy • Other factors also relevant – Several stars in our galaxy with planets the size of Jupiter within terrestrial zone from their sun – Mass of star • Larger mass, greater luminosity, shorter life • Most abundant stars in galaxy are least luminous and longest-lived (M- ...
starevolution - Global Change Program
... weight of about 4). To make one He atom, we therefore need four H atoms and some modifications. Assuming we are able to overcome the repelling force of the protons, the combined mass of 4 H atoms equals 6.696E-24gram, which exceeds the mass of He. The excess mass is released as energy following Albe ...
... weight of about 4). To make one He atom, we therefore need four H atoms and some modifications. Assuming we are able to overcome the repelling force of the protons, the combined mass of 4 H atoms equals 6.696E-24gram, which exceeds the mass of He. The excess mass is released as energy following Albe ...
of the outer planets are gas
... This planet is about 4 times the size of Earth (which makes it one of the smaller gas giants) and 19 times farther from the sun, relative to Earth. The surface of this planet is made up of clouds of blue-green ice crystals of methane and rock. This gas giant has a retrograde rotation. It is one of t ...
... This planet is about 4 times the size of Earth (which makes it one of the smaller gas giants) and 19 times farther from the sun, relative to Earth. The surface of this planet is made up of clouds of blue-green ice crystals of methane and rock. This gas giant has a retrograde rotation. It is one of t ...
Size and Scale of the Universe (Teacher Guide)
... Grades 9-12: Earth Sciences, Earth’s Place in the Universe 1. Astronomy and planetary exploration reveal the solar system’s structure, scale, and change over time. As a basis for understanding this concept: d. Students know the evidence indicating that the planets are much closer to Earth than the s ...
... Grades 9-12: Earth Sciences, Earth’s Place in the Universe 1. Astronomy and planetary exploration reveal the solar system’s structure, scale, and change over time. As a basis for understanding this concept: d. Students know the evidence indicating that the planets are much closer to Earth than the s ...
Star and Galaxies
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Space and Projectile Motion
... At the Kennedy Space Center, this drops to about 0.40 km/s, because it is not at the equator. Given that a satellite must reach an orbital velocity of about 7 km/s, the effect of the Earth’s rotation is significant. ...
... At the Kennedy Space Center, this drops to about 0.40 km/s, because it is not at the equator. Given that a satellite must reach an orbital velocity of about 7 km/s, the effect of the Earth’s rotation is significant. ...
Lecture 5
... Why Mass Control the Properties of a MainSequence Star? • Main sequence stars are same as Sun>thermonuclear reactions • Greater the Mass, greater the pressure and temperature at the Core->FASTER thermonuclear reaction->more LUMINOUS • Models of Main-Sequence Stars: for the stars to maintain equilib ...
... Why Mass Control the Properties of a MainSequence Star? • Main sequence stars are same as Sun>thermonuclear reactions • Greater the Mass, greater the pressure and temperature at the Core->FASTER thermonuclear reaction->more LUMINOUS • Models of Main-Sequence Stars: for the stars to maintain equilib ...
Astronomy Exam #2 for the 10
... The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence lifetime compared to the ...
... The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence lifetime compared to the ...
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.