Weighing a Galaxy15 Nov 11/15/2010
... M = R3 / T2 for R in AU, T in years, and M in solar masses. ...
... M = R3 / T2 for R in AU, T in years, and M in solar masses. ...
Chapter 1 Our Place in the Universe
... Galaxies are carried along with the expansion of the Universe. But how did Hubble figure out that the universe is expanding? ...
... Galaxies are carried along with the expansion of the Universe. But how did Hubble figure out that the universe is expanding? ...
A New Gravitational Effect
... effects is to improve the current accuracy of GPS and to create future time transfer and navigation systems that have several orders of magnitude better accuracy. At the present time, it is well-known that small anomalies exist in position and time computed from GPS data. The origin of these anomali ...
... effects is to improve the current accuracy of GPS and to create future time transfer and navigation systems that have several orders of magnitude better accuracy. At the present time, it is well-known that small anomalies exist in position and time computed from GPS data. The origin of these anomali ...
Stars and Nebulae
... million years. Cooler, lighter stars like our sun take 10 billion years to become red giants. This fact actually provides a way of testing how old a group of stars is - jut make an H-R diagram for the stars, and see which classes of stars have evolved off the main sequence! Eventually, all the heliu ...
... million years. Cooler, lighter stars like our sun take 10 billion years to become red giants. This fact actually provides a way of testing how old a group of stars is - jut make an H-R diagram for the stars, and see which classes of stars have evolved off the main sequence! Eventually, all the heliu ...
THE SUN IS NOT AN AVERAGE STAR Sometimes biblical creation
... stars, but requires conformity for two reasons. One reason is that evolutionism tries (unsuccessfully) to explain how all planets and stars could have developed by the same natural causes acting uniformly everywhere. This is manifestly impossible if every celestial body is special and different from ...
... stars, but requires conformity for two reasons. One reason is that evolutionism tries (unsuccessfully) to explain how all planets and stars could have developed by the same natural causes acting uniformly everywhere. This is manifestly impossible if every celestial body is special and different from ...
Star A
... objects emitting the lines are in orbit. Media Clip In the more common single-line systems, one star is too faint for its spectrum to be distinguished, so we see only one set of lines shifting back and forth. This shifting means that the detected star must be in orbit around another star, even thoug ...
... objects emitting the lines are in orbit. Media Clip In the more common single-line systems, one star is too faint for its spectrum to be distinguished, so we see only one set of lines shifting back and forth. This shifting means that the detected star must be in orbit around another star, even thoug ...
Beyond the Solar System Homework for Geology 8
... 57. The brightness of a star when viewed from Earth is called its ____________ magnitude. 58. The true brightness of a star, which takes into account the distance from the Earth by using a standard distance, is called its ____________ magnitude. 59. A 1st (first) magnitude star is approximately ____ ...
... 57. The brightness of a star when viewed from Earth is called its ____________ magnitude. 58. The true brightness of a star, which takes into account the distance from the Earth by using a standard distance, is called its ____________ magnitude. 59. A 1st (first) magnitude star is approximately ____ ...
ASTR3007/4007/6007, Class 1: Observing the Stars 23 February
... temperature, so the spectral classes correspond to different ranges of surface temperature. O is the hottest, and M is the coolest. Today we know that both surface temperature and spectrum are mostly determined by stellar mass, as we’ll discuss later in the course. Thus the spectral classes correspo ...
... temperature, so the spectral classes correspond to different ranges of surface temperature. O is the hottest, and M is the coolest. Today we know that both surface temperature and spectrum are mostly determined by stellar mass, as we’ll discuss later in the course. Thus the spectral classes correspo ...
What is a Scientist? - Cockeysville Middle School
... Stars are giant spheres of glowing gases. A star is powered by nuclear fusion. This is a process whereby hydrogen atoms are fused together to create helium atoms. In the process a tremendous amount of energy is given off in the form of electromagnetic waves and heat. There are billions of stars in a ...
... Stars are giant spheres of glowing gases. A star is powered by nuclear fusion. This is a process whereby hydrogen atoms are fused together to create helium atoms. In the process a tremendous amount of energy is given off in the form of electromagnetic waves and heat. There are billions of stars in a ...
Nonlinear Tides in Exoplanet Host Stars - CIERA
... (In preparation. With UVa undergrads Sarah Peacock and Meredith Nelson) ...
... (In preparation. With UVa undergrads Sarah Peacock and Meredith Nelson) ...
Chapter 13 - USM People Pages
... d. Use the experimentally determined “best-fit” line in Figure 13.17 to find the mass of the sun. 52. || Large stars can explode as they finish burning their nuclear fuel, causing a supernova. The explosion blows away the outer layers of the star. According to Newton’s third law, the forces that pus ...
... d. Use the experimentally determined “best-fit” line in Figure 13.17 to find the mass of the sun. 52. || Large stars can explode as they finish burning their nuclear fuel, causing a supernova. The explosion blows away the outer layers of the star. According to Newton’s third law, the forces that pus ...
Student Worksheet - Indiana University Astronomy
... adjacent image (© T. Credner & S. Kohle, AlltheSky.com), which shows a broad region of sky in the direction of the constellation Ophiuchus, including other star clusters, such as the globular clusters Messier10 and Messier 12. A blowup of the cluster IC 4665 is shown to the left, obtained from the S ...
... adjacent image (© T. Credner & S. Kohle, AlltheSky.com), which shows a broad region of sky in the direction of the constellation Ophiuchus, including other star clusters, such as the globular clusters Messier10 and Messier 12. A blowup of the cluster IC 4665 is shown to the left, obtained from the S ...
MSL Electromagnetic Spectrum
... Doppler Effect Summary Motion toward or away from an observer causes a shift in the observed wavelength of light: • blueshift (shorter wavelength) motion toward you ...
... Doppler Effect Summary Motion toward or away from an observer causes a shift in the observed wavelength of light: • blueshift (shorter wavelength) motion toward you ...
Section 2 Movements of the Earth
... infrared radiation from objects in space after it is launched in 2011. ...
... infrared radiation from objects in space after it is launched in 2011. ...
Does the solar orbit about the Galaxy influence terrestrial biodiversity?
... genera versus time from Sepkoski’s compendium1, converted to the 2004 Geologic Time Scale5. b, The black plot shows the same data, with single occurrence and poorly dated genera removed. The trend line (blue) is a third-order polynomial fitted to the data. c, As b, with the trend subtracted and a 62 ...
... genera versus time from Sepkoski’s compendium1, converted to the 2004 Geologic Time Scale5. b, The black plot shows the same data, with single occurrence and poorly dated genera removed. The trend line (blue) is a third-order polynomial fitted to the data. c, As b, with the trend subtracted and a 62 ...
ph507lecnote06
... Therefore, specialized techniques that can measure radial velocity shifts of ~10-3 of a pixel stably over many years are required High sensitivity to small radial velocity shifts is achieved by: • comparing high S/N = 200 - 500 spectra with template stellar spectra • using a large number of lines in ...
... Therefore, specialized techniques that can measure radial velocity shifts of ~10-3 of a pixel stably over many years are required High sensitivity to small radial velocity shifts is achieved by: • comparing high S/N = 200 - 500 spectra with template stellar spectra • using a large number of lines in ...
Basic Properties of the Stars
... The Sun-centered model of the solar system laid out by Copernicus in De Revolutionibus (1543) made a very specific prediction: that the nearby stars should exhibit parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as ...
... The Sun-centered model of the solar system laid out by Copernicus in De Revolutionibus (1543) made a very specific prediction: that the nearby stars should exhibit parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as ...
Oct 2012 - Bays Mountain Park
... telescope and crank up the power on the southwestern one. This is Uranus, and with about 100-150X, you should be able to spy the 6 arcsecond face of the planet. Uranus is currently about 1.77 billion miles from Earth. Jupiter rises around 10 p.m. in early October and is high enough for observing by ...
... telescope and crank up the power on the southwestern one. This is Uranus, and with about 100-150X, you should be able to spy the 6 arcsecond face of the planet. Uranus is currently about 1.77 billion miles from Earth. Jupiter rises around 10 p.m. in early October and is high enough for observing by ...
Lecture 7
... surrounding their hot, dense cores. If you were looking at the spectra of light coming from the Sun (or any star), which of the three types of spectra would be observed? • If a star existed that was only a hot dense core and did not have a low-density atmosphere surrounding it, what type of spectrum ...
... surrounding their hot, dense cores. If you were looking at the spectra of light coming from the Sun (or any star), which of the three types of spectra would be observed? • If a star existed that was only a hot dense core and did not have a low-density atmosphere surrounding it, what type of spectrum ...
DP11 Foundations of Astronomy
... luminosities, we can also find out their radii. There turns out to be a very large range. The largest stars are bigger than Earth's orbit, while the smallest are only a few kilometres across. ...
... luminosities, we can also find out their radii. There turns out to be a very large range. The largest stars are bigger than Earth's orbit, while the smallest are only a few kilometres across. ...
File
... planets—they can come from any direction. Long period comets spend most of their time in orbits far from the Sun—a region called the Oort cloud, as far out as 100,000 AU. Many comets are believed to have originated in the inner Solar System, but were then gravitationally flung outward by the planets ...
... planets—they can come from any direction. Long period comets spend most of their time in orbits far from the Sun—a region called the Oort cloud, as far out as 100,000 AU. Many comets are believed to have originated in the inner Solar System, but were then gravitationally flung outward by the planets ...
Introduction to Adaptive Optics
... – Black hole at the center of our galaxy – Star population in globular clusters ...
... – Black hole at the center of our galaxy – Star population in globular clusters ...
Solar System: Planets Asteroids Comets
... 1.524 AU, Jupiter at 5.204 AU, Saturn at 9.582AU. Amazingly, Uranus at 19.23AU was determined in 1781 to be a planet an not a star. The gap at 2.8 is located in the belt of asteroids between Mars and Jupiter. The dwarf planet Ceres at 2.766AU was discovered in 1801 at almost exactly the predicted lo ...
... 1.524 AU, Jupiter at 5.204 AU, Saturn at 9.582AU. Amazingly, Uranus at 19.23AU was determined in 1781 to be a planet an not a star. The gap at 2.8 is located in the belt of asteroids between Mars and Jupiter. The dwarf planet Ceres at 2.766AU was discovered in 1801 at almost exactly the predicted lo ...
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.