Sample Exam 1
... d. old NASA satellites and other space junk 28. What is the likely cause of the 98 degree tilt of Uranus’ axis? a. A collision with a large body early in the evolution of the solar system. b. Distorted magnetic poles due it its large molten iron core. c. Fluid wave dynamics due to its large molten c ...
... d. old NASA satellites and other space junk 28. What is the likely cause of the 98 degree tilt of Uranus’ axis? a. A collision with a large body early in the evolution of the solar system. b. Distorted magnetic poles due it its large molten iron core. c. Fluid wave dynamics due to its large molten c ...
1 - Physics
... 6. Which takes longer to form, stars the mass of the sun or stars ten times the mass of the sun? • A) ten times the mass of the sun • B) both take the same length of time to form • C) mass of the sun • D) the formation rates will depend on the rotation of the gas clouds 7. Of the following, which i ...
... 6. Which takes longer to form, stars the mass of the sun or stars ten times the mass of the sun? • A) ten times the mass of the sun • B) both take the same length of time to form • C) mass of the sun • D) the formation rates will depend on the rotation of the gas clouds 7. Of the following, which i ...
Precession of Earth
... pattern rather than pointing at a single spot or staying mostly still. If you draw an imaginary line of the earth's axis and continue it up to the sky, it will make a similar path. This type of axis rotation is called precession. In the case of the earth, precession is caused by the gravitational pu ...
... pattern rather than pointing at a single spot or staying mostly still. If you draw an imaginary line of the earth's axis and continue it up to the sky, it will make a similar path. This type of axis rotation is called precession. In the case of the earth, precession is caused by the gravitational pu ...
Big bang galaxies stars Name: Date: 1. The diagram below
... Base your answer(s) to the following question(s) on the calendar model shown below of the inferred history of the universe and on your knowledge of Earth science. The 12-month time line begins with the Big Bang on January 1 and continues to the present time, which is represented by midnight on Decem ...
... Base your answer(s) to the following question(s) on the calendar model shown below of the inferred history of the universe and on your knowledge of Earth science. The 12-month time line begins with the Big Bang on January 1 and continues to the present time, which is represented by midnight on Decem ...
star guide 2013
... work hard sending back information about our weather, providing communication services or even spying! Some satellites have large flat reflective panels on them which appear to flash when they catch the Sun’s light. The brightest of these flashes are called Iridium Flares and some are even bright en ...
... work hard sending back information about our weather, providing communication services or even spying! Some satellites have large flat reflective panels on them which appear to flash when they catch the Sun’s light. The brightest of these flashes are called Iridium Flares and some are even bright en ...
Lecture 19 - Stellar Lifecycles
... depends on their mass. The H-R diagram showing the • Almost the entire lifetime Main Sequence line (in purple). of a star is spent on the More massive stars are to the upper left, Main Sequence. less massive stars to the lower right. ...
... depends on their mass. The H-R diagram showing the • Almost the entire lifetime Main Sequence line (in purple). of a star is spent on the More massive stars are to the upper left, Main Sequence. less massive stars to the lower right. ...
Summary: Nuclear burning in stars
... The masses of galaxies • P2 (M1 + M2) = a3 • Velocity = (2πa)/P ∝ √ 1/ a • Measure Doppler shift of absorption lines & emission lines at different points in galaxy. ...
... The masses of galaxies • P2 (M1 + M2) = a3 • Velocity = (2πa)/P ∝ √ 1/ a • Measure Doppler shift of absorption lines & emission lines at different points in galaxy. ...
ISM&Galaxy
... Emission and Absorption Spectra More accurately, a gas cloud is only opaque within spectral lines, while a star is opaque at all wavelengths. The brightness of each depends on the usual T4 relation. If, as is usually the case, the cloud is colder than the star (or the star’s atmosphere is colder th ...
... Emission and Absorption Spectra More accurately, a gas cloud is only opaque within spectral lines, while a star is opaque at all wavelengths. The brightness of each depends on the usual T4 relation. If, as is usually the case, the cloud is colder than the star (or the star’s atmosphere is colder th ...
Galaxy clusters - University of Iowa Astrophysics
... • From this, the amount of X-ray emitting gas can be calculated to be 2×1014 M • The mass of X-ray emitting gas is greater than the mass in all the stars in all the galaxies in the cluster and about 10% of the total mass. ...
... • From this, the amount of X-ray emitting gas can be calculated to be 2×1014 M • The mass of X-ray emitting gas is greater than the mass in all the stars in all the galaxies in the cluster and about 10% of the total mass. ...
Other Galaxies, their Distances, and the Expansion of the Universe
... Some galaxies even show evidence for very violent ejection of material into the intergalactic space ...
... Some galaxies even show evidence for very violent ejection of material into the intergalactic space ...
A Unique Environmental Studies Program
... Sack". This is a cloud of very dark dust or gas and even though there may be stars behind it, their light cannot shine through. The Clouds of Magellan. These clouds were first described by the explorer Magellan, and they are actually two satellites of our own Milky Way galaxy. These clouds are easil ...
... Sack". This is a cloud of very dark dust or gas and even though there may be stars behind it, their light cannot shine through. The Clouds of Magellan. These clouds were first described by the explorer Magellan, and they are actually two satellites of our own Milky Way galaxy. These clouds are easil ...
Extreme Stars
... Stars have been forming continuously since the Universe began 13.7 billion years ago ...
... Stars have been forming continuously since the Universe began 13.7 billion years ago ...
Terminology Used in Planetary Data
... them. For simplicity, the orbits are often depicted as being circular, but in fact most of them are actually oval shaped, or elliptical. With the planets, the further away from the Sun you go, the more elliptical the orbit is. This means that there are times when the orbiting body is closer to its p ...
... them. For simplicity, the orbits are often depicted as being circular, but in fact most of them are actually oval shaped, or elliptical. With the planets, the further away from the Sun you go, the more elliptical the orbit is. This means that there are times when the orbiting body is closer to its p ...
Binary Orbits
... One star goes behind the other A. The two stars are sufficiently close B. One is large enough to block the other C. The inclination angle is close to 90 Stars are so close that thay cannot be distinguished, but detected due to reduction of light. ...
... One star goes behind the other A. The two stars are sufficiently close B. One is large enough to block the other C. The inclination angle is close to 90 Stars are so close that thay cannot be distinguished, but detected due to reduction of light. ...
An introduction to the HR diagram File
... large radius and high surface temperatures. This is what makes them highly luminous. • They are using up their hydrogen fuel tremendously quickly. So they are extremely short lived (c10 000 000 ...
... large radius and high surface temperatures. This is what makes them highly luminous. • They are using up their hydrogen fuel tremendously quickly. So they are extremely short lived (c10 000 000 ...
08 September: How far away are the closest stars?
... Arcturus … 36 light years Vega … 26 light years Altair … 17 light years Beta Canum Venaticorum .. 27 light years (a star like the Sun) • Lambda Serpentis … 38 light years (***) • 72 Herculis … 47 light years (***) • 18 Scorpii … 46 light years (the “Solar Twin”) ...
... Arcturus … 36 light years Vega … 26 light years Altair … 17 light years Beta Canum Venaticorum .. 27 light years (a star like the Sun) • Lambda Serpentis … 38 light years (***) • 72 Herculis … 47 light years (***) • 18 Scorpii … 46 light years (the “Solar Twin”) ...
constellations
... The southern hemisphere constellations mostly date from the 16th century, and many have names influenced by scientific trends of the time, e.g. Microscopium (microscope), Horologium (clock), Norma (set-square), etc. There are 88 modern constellations, as recognised by the International Astronomical ...
... The southern hemisphere constellations mostly date from the 16th century, and many have names influenced by scientific trends of the time, e.g. Microscopium (microscope), Horologium (clock), Norma (set-square), etc. There are 88 modern constellations, as recognised by the International Astronomical ...
Lecture notes -- pdf file - University of Iowa Astrophysics
... The distances to the stars are truly enormous • If the distance between the Earth and Sun were shrunk to 1 cm (0.4 inches), Alpha Centauri would be 2.75 km (1.7 miles) away ...
... The distances to the stars are truly enormous • If the distance between the Earth and Sun were shrunk to 1 cm (0.4 inches), Alpha Centauri would be 2.75 km (1.7 miles) away ...
Hypervelocity Globular: A beacon of merging clusters Oleg Gnedin with Alexey Vikhlinin
... While measuring radial velocities of globular clusters around M87 in Virgo Cluster, Caldwell et al. (2014) found an outlier… A triple interaction with a binary black hole (slingshot) can lead to a very high ejection velocity. ...
... While measuring radial velocities of globular clusters around M87 in Virgo Cluster, Caldwell et al. (2014) found an outlier… A triple interaction with a binary black hole (slingshot) can lead to a very high ejection velocity. ...
Planetary Configurations
... • Photons “random walk” or diffuse from core to photosphere. This occurs as atoms and electrons absorb and scatter (bounce) the photons. • Aside from energy, photons also possess momentum, and so they give an outward “kick” against gravity as ...
... • Photons “random walk” or diffuse from core to photosphere. This occurs as atoms and electrons absorb and scatter (bounce) the photons. • Aside from energy, photons also possess momentum, and so they give an outward “kick” against gravity as ...
Exam #2 Solutions
... The cooler giant stars are mostly K and M giants with temperatures around 5,000 K to 3,000K and luminosities between 50 and 5,000 solar luminosities. The stars are all larger in radius than the Sun, being between 1 and 100 solar radii. All these stars will have very short lifetimes compared to ...
... The cooler giant stars are mostly K and M giants with temperatures around 5,000 K to 3,000K and luminosities between 50 and 5,000 solar luminosities. The stars are all larger in radius than the Sun, being between 1 and 100 solar radii. All these stars will have very short lifetimes compared to ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.