AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
... the basis of a geometric progression rather than an arithmetic progression • The modern magnitude classification: a difference of 5 magnitudes to equal exactly a factor of 100 in apparent brightness • If m1 and m2 are the apparent magnitudes with apparent brightness f1 and f1 m2 − m1 = 2.5 log10 (f1 ...
... the basis of a geometric progression rather than an arithmetic progression • The modern magnitude classification: a difference of 5 magnitudes to equal exactly a factor of 100 in apparent brightness • If m1 and m2 are the apparent magnitudes with apparent brightness f1 and f1 m2 − m1 = 2.5 log10 (f1 ...
Student Worksheet - Indiana University Astronomy
... Step 3. In each square, compute the ratio of the number of IR stars to the number of visible stars, and record the number in the square. Circle the ratio in each square. Step 4. Create a color transformation for the ratio of IR/visible stars. Divide the range from the highest to the lowest ratio int ...
... Step 3. In each square, compute the ratio of the number of IR stars to the number of visible stars, and record the number in the square. Circle the ratio in each square. Step 4. Create a color transformation for the ratio of IR/visible stars. Divide the range from the highest to the lowest ratio int ...
Telescopes
... larger collecting area can gather a greater amount of light in a shorter time. _______________________________: Also called Resolving Power. Telescopes that are larger are capable of taking images with greater detail. ...
... larger collecting area can gather a greater amount of light in a shorter time. _______________________________: Also called Resolving Power. Telescopes that are larger are capable of taking images with greater detail. ...
Concept for a Large Scalable Space Telescope: In
... microns, has been the most productive scientific space telescope of all time1. HST has provided key discoveries in many areas of astrophysical research, including the nature of massive black holes, quasars, dark energy, galaxy evolution, the intergalactic medium, and planetary disks, and has has exc ...
... microns, has been the most productive scientific space telescope of all time1. HST has provided key discoveries in many areas of astrophysical research, including the nature of massive black holes, quasars, dark energy, galaxy evolution, the intergalactic medium, and planetary disks, and has has exc ...
Color-Magnitude Diagram Lab Manual
... display drifts slightly to the right. This is because the Earths rotation shifts the position of stars in the night sky. To compensate for this, turn on the tracking motor by clicking the Tracking button. The tracking motor is built into telescopes to compensate for the Earths rotation, so that an o ...
... display drifts slightly to the right. This is because the Earths rotation shifts the position of stars in the night sky. To compensate for this, turn on the tracking motor by clicking the Tracking button. The tracking motor is built into telescopes to compensate for the Earths rotation, so that an o ...
Biblical Astrophysics - The Call of the Bride
... Scientists have concluded that we currently live in a universe of primarily secondgeneration stars. Most of the first-generation stars have already either violently exploded as super novas (which is where all atoms heavier than iron come from), or they have peacefully cast off their outer atmosphere ...
... Scientists have concluded that we currently live in a universe of primarily secondgeneration stars. Most of the first-generation stars have already either violently exploded as super novas (which is where all atoms heavier than iron come from), or they have peacefully cast off their outer atmosphere ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... Cumulative You can bring in one 8 ½ by 11 inch piece of paper with anything written on it ...
... Cumulative You can bring in one 8 ½ by 11 inch piece of paper with anything written on it ...
CO 2 Cycle
... Bright new deposits seen in NASA images of two gullies on Mars suggest liquid water carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking ou ...
... Bright new deposits seen in NASA images of two gullies on Mars suggest liquid water carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking ou ...
Physics-Y11-LP3 - All Saints` Catholic High School
... with a period related to their luminosity • recall that and explain qualitatively how this relationship enables astronomers to estimate the distance to Cepheid variable stars • understand the role of observations of Cepheid variable stars in establishing the scale of the Universe and the nature of m ...
... with a period related to their luminosity • recall that and explain qualitatively how this relationship enables astronomers to estimate the distance to Cepheid variable stars • understand the role of observations of Cepheid variable stars in establishing the scale of the Universe and the nature of m ...
File
... A. ______________ 700,000 km (more than 100 Earth radii) 1. If Earth was the size of a _________, the sun would have a diameter of ___ m and they would be __________ meters apart. B. Astronomical unit (a.u.) = average distance from Earth to the sun 1. ______ million km or ____ million miles C. ___ ...
... A. ______________ 700,000 km (more than 100 Earth radii) 1. If Earth was the size of a _________, the sun would have a diameter of ___ m and they would be __________ meters apart. B. Astronomical unit (a.u.) = average distance from Earth to the sun 1. ______ million km or ____ million miles C. ___ ...
“Breakthroughs” of the 20th Century
... asteroids, pulsars, black holes, the cosmic microwave background and the 21 cm radiation, spring to mind. In the context of “similar” objects one can think of galaxies. Astronomers spent the first few thousand years of their scientific endeavour being convinced that there was but one galaxy, the one ...
... asteroids, pulsars, black holes, the cosmic microwave background and the 21 cm radiation, spring to mind. In the context of “similar” objects one can think of galaxies. Astronomers spent the first few thousand years of their scientific endeavour being convinced that there was but one galaxy, the one ...
Power Point Kickoff Mtg
... GOAL : To have an operational HVAC system in place, with the capability to set the dome thermal environment to a temperature specified by the operator. That temperature will be based on predictions as to what the outside temperature will be during that evenings ...
... GOAL : To have an operational HVAC system in place, with the capability to set the dome thermal environment to a temperature specified by the operator. That temperature will be based on predictions as to what the outside temperature will be during that evenings ...
Chapter 3 The Science of Astronomy In what ways do all humans
... • Compiled the most accurate (one arcminute) naked eye measurements ever made of planetary positions. • Still could not detect stellar parallax, and thus still thought Earth must be at center of solar system (but recognized that other planets go around Sun) • Hired Kepler, who used Tycho’s observati ...
... • Compiled the most accurate (one arcminute) naked eye measurements ever made of planetary positions. • Still could not detect stellar parallax, and thus still thought Earth must be at center of solar system (but recognized that other planets go around Sun) • Hired Kepler, who used Tycho’s observati ...
ASTR 1120 General Astronomy: Stars and Galaxies
... Ptolemy Broke Stars into 5 magnitude groups m=1 the brightest, m=5 the faintest In 1700’s it was found this was a logarithmic scale, as that is how the naked eye responds. Also, faintest were about 100x fainter than brightest. Break the factor of 100 into 5 equal factors: ...
... Ptolemy Broke Stars into 5 magnitude groups m=1 the brightest, m=5 the faintest In 1700’s it was found this was a logarithmic scale, as that is how the naked eye responds. Also, faintest were about 100x fainter than brightest. Break the factor of 100 into 5 equal factors: ...
4 how our solar system formed
... Worlds collided, combined, and evolved for a dramatic period of time. When it was over, there remained eight stable planets that had swept their orbits clean. To be called a planet, it must orbit the Sun. It must also be massive enough for its own gravity to form it into a sphere, and has cleaned it ...
... Worlds collided, combined, and evolved for a dramatic period of time. When it was over, there remained eight stable planets that had swept their orbits clean. To be called a planet, it must orbit the Sun. It must also be massive enough for its own gravity to form it into a sphere, and has cleaned it ...
PDF of story and photos
... over billions of years the asteroid began rotating faster and faster, eventually causing it to start losing material from its surface. The researchers do not think the tails formed from a collision with another asteroid. A collision would cause a large cloud of dust to blast into space all at once. ...
... over billions of years the asteroid began rotating faster and faster, eventually causing it to start losing material from its surface. The researchers do not think the tails formed from a collision with another asteroid. A collision would cause a large cloud of dust to blast into space all at once. ...
AN OPTICAL INFRARED ASTROMETRIC - Cosmos
... annular region outside the astrometric eld up to 0:6 in diameter we set multi-color photometry array detectors to get precise wide-band and/or intermediateband spectroscopic information of the observed stars. With the baseline B = 1 m the width of a stellar fringe in V-band is 0.11 arcsec at = 55 ...
... annular region outside the astrometric eld up to 0:6 in diameter we set multi-color photometry array detectors to get precise wide-band and/or intermediateband spectroscopic information of the observed stars. With the baseline B = 1 m the width of a stellar fringe in V-band is 0.11 arcsec at = 55 ...
Homework October 24-28
... radiation D) redshift 3. Based on data collected from many different sources, such as the Hubble telescope and The Wilkinson Microwave Anisotropy Probe (WMAP), scientists have been able to show that about 75% of the universe is composed of dark energy. Which of these theories becomes more credible k ...
... radiation D) redshift 3. Based on data collected from many different sources, such as the Hubble telescope and The Wilkinson Microwave Anisotropy Probe (WMAP), scientists have been able to show that about 75% of the universe is composed of dark energy. Which of these theories becomes more credible k ...
Slide 1
... Since then, radio astronomers have developed sophisticated systems that allow them to make pictures from the radio waves emitted by astronomical objects. A number of celestial objects emit more strongly at radio than they do at visible wavelengths, so radio astronomy has produced many surprises in t ...
... Since then, radio astronomers have developed sophisticated systems that allow them to make pictures from the radio waves emitted by astronomical objects. A number of celestial objects emit more strongly at radio than they do at visible wavelengths, so radio astronomy has produced many surprises in t ...
Constellations - Sierra Star Gazers
... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
... Just rising over the northeastern horizon is the constellation Perseus. Between Perseus and Cassiopeia is found one the most interesting objects to be seen through a small to medium aperture scope. The best thing is that it so easy to locate. NGC 869 & 884, popularly known as the Double Cluster, are ...
Clear Skies - Cowichan Valley Starfinders Society
... myself set up a display at the Farm Market beside Serious Coffee. My telescope was set up for viewing the sun, though it was barely discernible through the cloud haze. We provided quite a few pamphlets on the ISP and the CVSF to people shopping at the Market. I was quite pleased at the response, and ...
... myself set up a display at the Farm Market beside Serious Coffee. My telescope was set up for viewing the sun, though it was barely discernible through the cloud haze. We provided quite a few pamphlets on the ISP and the CVSF to people shopping at the Market. I was quite pleased at the response, and ...
The Cosmic Microwave Background Radiation Temperature
... In practice, this correction is dicult to achieve with the telescope we have, because of contamination from \stray" radiation entering the feed through sidelobes in the telescope's sensitivity pattern vs. angle, much as o -axis scattered light can contaminate optical telescope photometry. Stray rad ...
... In practice, this correction is dicult to achieve with the telescope we have, because of contamination from \stray" radiation entering the feed through sidelobes in the telescope's sensitivity pattern vs. angle, much as o -axis scattered light can contaminate optical telescope photometry. Stray rad ...
Star Light, Star Not Star Light, Star Not-So-Bright
... from the BD star catalogue (epoch 1855), which covers the northern sky to -2 degrees Dec. as seen from Bonn, Germany. About 75% of these number of stars are above the horizon at any particular time. However, extrapolating the visible southern sky we can also see not included in the BD star catalog, ...
... from the BD star catalogue (epoch 1855), which covers the northern sky to -2 degrees Dec. as seen from Bonn, Germany. About 75% of these number of stars are above the horizon at any particular time. However, extrapolating the visible southern sky we can also see not included in the BD star catalog, ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.