Super Giant
... Explain why the moon revolves around the Earth instead of the Sun. Even though the moon is larger than Pluto, which DOES revolve around the Sun, The moon revolves around the Earth because it is CLOSER to the Earth. The two factors that determine the force of gravity are mass and distance. What relat ...
... Explain why the moon revolves around the Earth instead of the Sun. Even though the moon is larger than Pluto, which DOES revolve around the Sun, The moon revolves around the Earth because it is CLOSER to the Earth. The two factors that determine the force of gravity are mass and distance. What relat ...
Measuring colour in astronomy
... body emits more radiation at any given temperature than any other object. (In reality there is no such thing as a perfectly black body, but there are objects which come very close to this theoretical ideal.) Other stars have spectra which are also close to being black body spectra. On a dark night i ...
... body emits more radiation at any given temperature than any other object. (In reality there is no such thing as a perfectly black body, but there are objects which come very close to this theoretical ideal.) Other stars have spectra which are also close to being black body spectra. On a dark night i ...
General Astronomy - Stockton University
... We may imagine the enormously complicated situation of changing things we call the physical universe is a chess game played by the gods; we are not permitted to play, but we can watch. Our problem is that we are left to puzzle out the rules of the game for ourselves as best we can by watching the pl ...
... We may imagine the enormously complicated situation of changing things we call the physical universe is a chess game played by the gods; we are not permitted to play, but we can watch. Our problem is that we are left to puzzle out the rules of the game for ourselves as best we can by watching the pl ...
Astrophysics notes - School
... Since 1 Mpc = 3.1x1022 m, the age of the universe is approximately: 3.1x1022 m / 65000 m.s-1 = 4.8x1017 s To calculate the age of the universe in years we need to divide by: (60s x 60min x 24hrs x 365.25 days) = 31557600 Number of seconds in a year Which gives us: ...
... Since 1 Mpc = 3.1x1022 m, the age of the universe is approximately: 3.1x1022 m / 65000 m.s-1 = 4.8x1017 s To calculate the age of the universe in years we need to divide by: (60s x 60min x 24hrs x 365.25 days) = 31557600 Number of seconds in a year Which gives us: ...
The Parent Stars of New Extrasolar Planet System Candidates
... Unlike Gliese 876, the two stars HR 810 and HR 7875 are very similar to the sun. They are each close to one solar mass and are slightly younger than the solar age of 4.6 Gyr. Finally, neither star shows signs of unusual composition. Because HR 810 and HR 7875 have so much in common with the sun, the ...
... Unlike Gliese 876, the two stars HR 810 and HR 7875 are very similar to the sun. They are each close to one solar mass and are slightly younger than the solar age of 4.6 Gyr. Finally, neither star shows signs of unusual composition. Because HR 810 and HR 7875 have so much in common with the sun, the ...
Stars - WhatisOutThere
... Stars are made of two very hot gases, hydrogen and helium. These are the two lightest elements. They shine by burning the hydrogen into helium in their cores, then later in life they create heavier elements. Most stars have heavy elements, like carbon, nitrogen, oxygen and iron but only small amount ...
... Stars are made of two very hot gases, hydrogen and helium. These are the two lightest elements. They shine by burning the hydrogen into helium in their cores, then later in life they create heavier elements. Most stars have heavy elements, like carbon, nitrogen, oxygen and iron but only small amount ...
ASTR1102-002 Potentially useful facts and mathematical relations
... Stars of type “A” are among the intrinsically brightest stars in our Galaxy. (True or False?) ANS: ...
... Stars of type “A” are among the intrinsically brightest stars in our Galaxy. (True or False?) ANS: ...
Astronomical Knowledge Questionnaire (Student
... summer there are few clouds which means the light coming from the Sun is stronger. The Earth’s tilted axis means that one hemisphere has more direct sunlight and longer days making it summer while the other hemisphere experiences winter. The Sun moves to make one side of the Earth hot for six mo ...
... summer there are few clouds which means the light coming from the Sun is stronger. The Earth’s tilted axis means that one hemisphere has more direct sunlight and longer days making it summer while the other hemisphere experiences winter. The Sun moves to make one side of the Earth hot for six mo ...
Stellar Evolution
... • “White dwarf” cools but does not contract because core is degenerate • No energy from fusion, no energy from gravitational contraction • White dwarf slowly fades away… ...
... • “White dwarf” cools but does not contract because core is degenerate • No energy from fusion, no energy from gravitational contraction • White dwarf slowly fades away… ...
r*=13.6 km MPA1 EOS
... "None of this was realized before simply because we couldn't get to the scene of the explosion fast enough." "Swift has the unique ability to detect bursts and turn its X-ray and ultravioletoptical telescopes to the explosion's embers within minutes. As such, Swift is detecting new burst details tha ...
... "None of this was realized before simply because we couldn't get to the scene of the explosion fast enough." "Swift has the unique ability to detect bursts and turn its X-ray and ultravioletoptical telescopes to the explosion's embers within minutes. As such, Swift is detecting new burst details tha ...
Lecture 1
... Describe how Star A would appear to move among the distant stars as Earth orbits the Sun counterclockwise from January of one year, through July, to January of the following year. Consider two stars (C and D) that both exhibit parallax. If Star C appears to move back and forth by a greater amount th ...
... Describe how Star A would appear to move among the distant stars as Earth orbits the Sun counterclockwise from January of one year, through July, to January of the following year. Consider two stars (C and D) that both exhibit parallax. If Star C appears to move back and forth by a greater amount th ...
Upsilon Andromedae
... Standard error: 0.004 Mean Vt magnitude: 4.159 Standard error: 0.003 Source of photometric data: The Bt,Vt data are median values, rather than de-censored mean values (mainly relevant for bright stars with Bt<=8.5 mag and Vt<=8.0 mag). Johnson B-V colour index: 0.541 Standard error: 0.004 Number of ...
... Standard error: 0.004 Mean Vt magnitude: 4.159 Standard error: 0.003 Source of photometric data: The Bt,Vt data are median values, rather than de-censored mean values (mainly relevant for bright stars with Bt<=8.5 mag and Vt<=8.0 mag). Johnson B-V colour index: 0.541 Standard error: 0.004 Number of ...
TRANSIT
... to date, an exoplanet with a radius only 50% larger than the Earth and possibly having liquid water on its surface. Using the ESO 3.6m telescope, a team of Swiss, French, and Portuguese scientists discovered a super-Earth about 5 times the mass of the Earth that orbits a red dwarf, already known to ...
... to date, an exoplanet with a radius only 50% larger than the Earth and possibly having liquid water on its surface. Using the ESO 3.6m telescope, a team of Swiss, French, and Portuguese scientists discovered a super-Earth about 5 times the mass of the Earth that orbits a red dwarf, already known to ...
Integrative Studies 410 Our Place in the Universe
... • Hubble Deep Field Project – 100 hour exposures over 10 days – Covered an area of the sky about 1/100 the size of the full moon ...
... • Hubble Deep Field Project – 100 hour exposures over 10 days – Covered an area of the sky about 1/100 the size of the full moon ...
Galaxies, Cosmology and the Accelera`ng Universe
... • Using infrared and radio waves we can see through the dust ...
... • Using infrared and radio waves we can see through the dust ...
February 13
... Spectrograph’s spread out the star light Getting a star’s spectrum is time consuming ...
... Spectrograph’s spread out the star light Getting a star’s spectrum is time consuming ...
Solutions are availble in PDF format.
... came out with an answer that had a temperature less than Mercury’s you should be suspicious: Vulcan is closer to the Sun than Mercury! It always pays to look at the end and make sure your answer makes sense with what is obvious. 3. Chatper 4, Question 16 in the text: Oops! I also assigned this as ho ...
... came out with an answer that had a temperature less than Mercury’s you should be suspicious: Vulcan is closer to the Sun than Mercury! It always pays to look at the end and make sure your answer makes sense with what is obvious. 3. Chatper 4, Question 16 in the text: Oops! I also assigned this as ho ...
–1– Lectures 18 and 19 Optical Depth vs. Density Imaging a sphere
... fragmentation will produce optically thick fragments. At this point, the cores are no longer isothermal. Since Jeans fragmentation requires an isothermal gas, this will also halt the fragmentation of the collapsing gas into progressively smaller pieces. Low and Lynden-Bell (1976) calculated that thi ...
... fragmentation will produce optically thick fragments. At this point, the cores are no longer isothermal. Since Jeans fragmentation requires an isothermal gas, this will also halt the fragmentation of the collapsing gas into progressively smaller pieces. Low and Lynden-Bell (1976) calculated that thi ...
November - Hawaiian Astronomical Society
... In other exoplanet news, a planet that is probably composed largely of diamond has been found orbiting the star 55 Cancri (Rho 1 Cancri). The innermost of 5 planets in the system, it orbits in only 18 hours. Even more exciting, an Earth-sized planet has been found to orbit Alpha Centauri B. While it ...
... In other exoplanet news, a planet that is probably composed largely of diamond has been found orbiting the star 55 Cancri (Rho 1 Cancri). The innermost of 5 planets in the system, it orbits in only 18 hours. Even more exciting, an Earth-sized planet has been found to orbit Alpha Centauri B. While it ...
Stars
... stars is reflected by their ______________ Think about a candle flame, the hottest part is the closest to the wick – which is blue! ...
... stars is reflected by their ______________ Think about a candle flame, the hottest part is the closest to the wick – which is blue! ...
cifutielu`s Astronomy Test 2014
... 5. _____ Supergiants that are 4 to 20 times more massive than the Sun and are 100,000 times more luminous. 6. _____ Red giants with a pulsation period greater than 100 days and are less than two solar masses massive. ...
... 5. _____ Supergiants that are 4 to 20 times more massive than the Sun and are 100,000 times more luminous. 6. _____ Red giants with a pulsation period greater than 100 days and are less than two solar masses massive. ...
Last time: looked at proton-proton chain to convert Hydrogen into
... Young stars which are still accreting material are called T-Tauri Stars. Because mass is piling on, they sometimes have explosive outbursts. ...
... Young stars which are still accreting material are called T-Tauri Stars. Because mass is piling on, they sometimes have explosive outbursts. ...
RASC Bulletin June 1996 - Royal Astronomical Society of Canada
... On the evening of March 16th, 1996 we embarked on a “dusk till dawn” astronomical race called the Messier marathon. The “run ners” were Toronto Centre members Stephen Keefer, Guy Nason, and myself. The event entailed viewing as many of the 110 Messier Catalogue objects as possible in one night. For ...
... On the evening of March 16th, 1996 we embarked on a “dusk till dawn” astronomical race called the Messier marathon. The “run ners” were Toronto Centre members Stephen Keefer, Guy Nason, and myself. The event entailed viewing as many of the 110 Messier Catalogue objects as possible in one night. For ...
Lecture 10: The Hertzsprung
... We know the masses for a few of the stars on the H-R diagram. When we plot the masses of the stars, we see that the main sequence is actually a mass sequence. More massive stars on the main sequence are hotter, low mass stars are cooler. Why? This is one of the things our model of how stars work nee ...
... We know the masses for a few of the stars on the H-R diagram. When we plot the masses of the stars, we see that the main sequence is actually a mass sequence. More massive stars on the main sequence are hotter, low mass stars are cooler. Why? This is one of the things our model of how stars work nee ...
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.