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Unit 1: The Big Picture
... No spiral arms, little dust or gas Made almost entirely of old reddish stars Stars orbit, but not all in the same path…don’t rotate Range in size from giant to dwarf Dwarf is the most common type of galaxy ...
... No spiral arms, little dust or gas Made almost entirely of old reddish stars Stars orbit, but not all in the same path…don’t rotate Range in size from giant to dwarf Dwarf is the most common type of galaxy ...
Astronomical Ideas Fall 2012 HW 2 solutions 1. a. Compare the
... the Sun is ~700,000 km. The ratio is thus ~ 0.00008, which means that ~0.008% of the Sunʼs light is blocked out by an Earth. 2. b. Consider an M-dwarf star with a radius one-half of the Sunʼs radius, a surface temperature that is 4,000 K, and a distance of 750 pc away from us. What percent of this s ...
... the Sun is ~700,000 km. The ratio is thus ~ 0.00008, which means that ~0.008% of the Sunʼs light is blocked out by an Earth. 2. b. Consider an M-dwarf star with a radius one-half of the Sunʼs radius, a surface temperature that is 4,000 K, and a distance of 750 pc away from us. What percent of this s ...
CONSTELLATION CASSIOPEIA named after the
... Mirror, published in London c. 1825. night. Newcomers to astronomy are often disappointed to find that the great majority of constellations bear little, if any, resemblance to the figures whose names they carry; but the constellation figures are not intended to be taken literally. Rather, they are s ...
... Mirror, published in London c. 1825. night. Newcomers to astronomy are often disappointed to find that the great majority of constellations bear little, if any, resemblance to the figures whose names they carry; but the constellation figures are not intended to be taken literally. Rather, they are s ...
here - British Astronomical Association
... Professionals need the observations (too many VS and too few professionals to observe them). VS tell us so much about stellar evolution and ultimately, the fate of our own Sun. It is one of the few areas where an amateur can make a contribution to science – and you don’t even need a ...
... Professionals need the observations (too many VS and too few professionals to observe them). VS tell us so much about stellar evolution and ultimately, the fate of our own Sun. It is one of the few areas where an amateur can make a contribution to science – and you don’t even need a ...
Planetarium Key Points
... the ecliptic, they tend to pull the equatorial bullge of the Earth towards it and most of this “flattening torque” is caused by the Moon and the Sun. But the Earth is rotating and therefore the torque cannot change the inclination of the equator relative to ecliptic, istead the rotation axis turns i ...
... the ecliptic, they tend to pull the equatorial bullge of the Earth towards it and most of this “flattening torque” is caused by the Moon and the Sun. But the Earth is rotating and therefore the torque cannot change the inclination of the equator relative to ecliptic, istead the rotation axis turns i ...
Mar 2017 - What`s Out Tonight?
... and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands star ...
... and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands star ...
What The Star of Bethlehem Was Not
... This theory has been championed, in various guises, by Patrick Moore. He suggests that the magi saw a bright meteor, or possibly two bright meteors – one to tell them when Jesus was born, the other to tell them that they had arrived at their destination. An alternative which he has proposed is a "Cy ...
... This theory has been championed, in various guises, by Patrick Moore. He suggests that the magi saw a bright meteor, or possibly two bright meteors – one to tell them when Jesus was born, the other to tell them that they had arrived at their destination. An alternative which he has proposed is a "Cy ...
Astronomy Chap 1
... 3. Are celestial objects like stars and planets in the daytime sky? 4. What is the relationship between latitude and the angular height of the Sun? 5. Explain how angular height of the Sun in different parts of the country correlate with sunburns. What is the critical angle? 6. Review the Solar Moti ...
... 3. Are celestial objects like stars and planets in the daytime sky? 4. What is the relationship between latitude and the angular height of the Sun? 5. Explain how angular height of the Sun in different parts of the country correlate with sunburns. What is the critical angle? 6. Review the Solar Moti ...
Earth and Space Science Teacher Notes
... c. Others work by collecting invisible energy waves such as radio waves and x-rays d. Hubble Space Telescope i. Is a reflecting telescope ii. It orbits the Earth and sends images to Earth from space iii. Since it is outside the Earth’s atmosphere, the images are not distorted iv. Using the HST, scie ...
... c. Others work by collecting invisible energy waves such as radio waves and x-rays d. Hubble Space Telescope i. Is a reflecting telescope ii. It orbits the Earth and sends images to Earth from space iii. Since it is outside the Earth’s atmosphere, the images are not distorted iv. Using the HST, scie ...
The Physics of Energy sources Stellar fusion
... ! Could you explain what is the source of energy of a Star? ! What is the proton-proton chain? ! Why can it work? ! What is the slowest process in this chain? ...
... ! Could you explain what is the source of energy of a Star? ! What is the proton-proton chain? ! Why can it work? ! What is the slowest process in this chain? ...
Lecture2
... becomes two dimensional due to our perspective on Earth. The north and south pole of the Earth extend out to the north and south celestial poles The equator of the Earth extends out to the celestial ...
... becomes two dimensional due to our perspective on Earth. The north and south pole of the Earth extend out to the north and south celestial poles The equator of the Earth extends out to the celestial ...
Gravitation and Orbital Motion
... better to weigh yourself when this heavenly body is directly overhead! If you have a mass of 85.0 kg, how much less do you weigh if you factor in the force exerted by the Moon when it is directly overhead (compared to when it is just rising or setting)? Use the values 7.35×1022 kg for the mass of th ...
... better to weigh yourself when this heavenly body is directly overhead! If you have a mass of 85.0 kg, how much less do you weigh if you factor in the force exerted by the Moon when it is directly overhead (compared to when it is just rising or setting)? Use the values 7.35×1022 kg for the mass of th ...
Announcements Evolution of High-Mass Stars: Red Supergiants
... • To map the Milky Way Galaxy, we need to measure distances to stars. • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
... • To map the Milky Way Galaxy, we need to measure distances to stars. • Parallax only works for nearby stars (within about 1000 light years) • For more distant stars, we use Standard Candles Car Headlights are standard candles: We use them to determine the car’s distance ...
Unit XII Study Guide
... 36. The length of a planet’s day is determined by its _________________________. 37. Icy objects that mostly travel in long, elliptical orbits around the sun are ____________________. 38. The ____________________ belt contains perhaps tens of thousands of objects orbiting within about 100 AU of the ...
... 36. The length of a planet’s day is determined by its _________________________. 37. Icy objects that mostly travel in long, elliptical orbits around the sun are ____________________. 38. The ____________________ belt contains perhaps tens of thousands of objects orbiting within about 100 AU of the ...
Stars and The Universe
... Log into the publisher’s website for our book at http://www.aw-bc.com/astronomyplace/ and do the tutorials on Kepler’s Laws. Take the multiple choice quizzes for Chapter 3. c. Working with your group members, research and prepare a report on one current or recent NASA exploratory mission to an objec ...
... Log into the publisher’s website for our book at http://www.aw-bc.com/astronomyplace/ and do the tutorials on Kepler’s Laws. Take the multiple choice quizzes for Chapter 3. c. Working with your group members, research and prepare a report on one current or recent NASA exploratory mission to an objec ...
The Naked Eye Era
... debt to him; his one-time assistant Johannes Kepler pored over these data for many years trying to find the patterns that governed the orbits of the planets. In 1609 he published his discovery that the planets move in elliptical orbits around the Sun contradicting once and for all the Ptolemaic insi ...
... debt to him; his one-time assistant Johannes Kepler pored over these data for many years trying to find the patterns that governed the orbits of the planets. In 1609 he published his discovery that the planets move in elliptical orbits around the Sun contradicting once and for all the Ptolemaic insi ...
Mon Aug 5, 2013 QUASAR DISCOVERY Quasars were discovered
... light they look like stars, but many of them also emit a lot of energy in other wavelengths of light invisible to the human eye. Quasars may appear dim, but that’s because they’re really far away, 10 to 15 billion light years out. 3C273 actually puts out more energy than the combined light of the hu ...
... light they look like stars, but many of them also emit a lot of energy in other wavelengths of light invisible to the human eye. Quasars may appear dim, but that’s because they’re really far away, 10 to 15 billion light years out. 3C273 actually puts out more energy than the combined light of the hu ...
Summary of the Presentation
... throughout their orbits (a reasonable requirement for habitability) can be estimated by using the star luminosity and orbit of each exoplanet to estimate equatorial exoEarth temperature. This was done for exoplanets orbiting main sequence stars only. Only 6 of 126 exoplanets examined would have had ...
... throughout their orbits (a reasonable requirement for habitability) can be estimated by using the star luminosity and orbit of each exoplanet to estimate equatorial exoEarth temperature. This was done for exoplanets orbiting main sequence stars only. Only 6 of 126 exoplanets examined would have had ...
The Sun
... • This is the origin of the 5800 K blackbody radiation we see. • Why? – At the photosphere, the density is so low that the gas is again transparent to light. – The hot convection cell tops radiate energy as a function of their temperature (5800 K). ...
... • This is the origin of the 5800 K blackbody radiation we see. • Why? – At the photosphere, the density is so low that the gas is again transparent to light. – The hot convection cell tops radiate energy as a function of their temperature (5800 K). ...
Astronomy_Stars_n_Galaxies_PowerPoint
... • The brightness of a star depends on both its size and temperature. Larger, hotter stars shine more brightly. • Because distances in space are so large, astronomers use a unit called the light-year. A light year is the distance that light travels in one year, or about 6 million million miles. ...
... • The brightness of a star depends on both its size and temperature. Larger, hotter stars shine more brightly. • Because distances in space are so large, astronomers use a unit called the light-year. A light year is the distance that light travels in one year, or about 6 million million miles. ...
ASTR0 100 HW #4 – SOLUTIONS – 2 points each
... (note that units again cancel!) c. Do you think it would still be possible to have life on Earth? No, at least not life as we know it. With rare exceptions, life on Earth is not capable of surviving at extreme climates, and a sun with double the temperature and 16 times the power would certainly pro ...
... (note that units again cancel!) c. Do you think it would still be possible to have life on Earth? No, at least not life as we know it. With rare exceptions, life on Earth is not capable of surviving at extreme climates, and a sun with double the temperature and 16 times the power would certainly pro ...
Comets, Meteors, and Meteoroids
... It is always exciting to see a falling star. It is gone almost as soon as you see it. You point to where it was and stare at the dark sky. You hope that you will see another falling star. What is a falling star? A falling star is not a star at all. It is not even part of a star. Stars do not fall. O ...
... It is always exciting to see a falling star. It is gone almost as soon as you see it. You point to where it was and stare at the dark sky. You hope that you will see another falling star. What is a falling star? A falling star is not a star at all. It is not even part of a star. Stars do not fall. O ...
Feb 2017 - What`s Out Tonight?
... and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands star ...
... and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters look like fuzzy balls because they contain all night and always outshines any star. Everyone enjoys its 4 tens of thousands star ...
Galaxy Notes Presentation
... giant spiral galaxy including our Sun The disk’s diameter is 100,000 light years Mass is 1,000 to 2,000 billion times the mass of the Sun The Sun lies a little more than 30,000 light years from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 bi ...
... giant spiral galaxy including our Sun The disk’s diameter is 100,000 light years Mass is 1,000 to 2,000 billion times the mass of the Sun The Sun lies a little more than 30,000 light years from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 bi ...
The Sun
... fusion of hydrogen in the sun is always a helium nucleus. The helium nucleus has about 0.7% less mass than the hydrogen nuclei that combined to form it. The lost mass is converted into energy during the series of fusion reactions that forms helium. Because all nuclear fusion releases energy, the thr ...
... fusion of hydrogen in the sun is always a helium nucleus. The helium nucleus has about 0.7% less mass than the hydrogen nuclei that combined to form it. The lost mass is converted into energy during the series of fusion reactions that forms helium. Because all nuclear fusion releases energy, the thr ...
R136a1
![](https://commons.wikimedia.org/wiki/Special:FilePath/R136a1_star.jpg?width=300)
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.