Our place in the Universe
... Hubble Ultra Deep Field (HUDF) Hubble took 11 days to look at a spot in the sky that appeared to be empty. This is what it found. ...
... Hubble Ultra Deep Field (HUDF) Hubble took 11 days to look at a spot in the sky that appeared to be empty. This is what it found. ...
Planetary Configurations
... • Most stars are on the Main Seq. Of these, most are low mass, low luminosity, red stars. • Hot, massive stars are rare. • HOWEVER, massive stars and giant stars are so much more luminous than red dwarfs, that they dominate the light output from galaxies ...
... • Most stars are on the Main Seq. Of these, most are low mass, low luminosity, red stars. • Hot, massive stars are rare. • HOWEVER, massive stars and giant stars are so much more luminous than red dwarfs, that they dominate the light output from galaxies ...
Prospecting for Planets – Radial Velocity Searches
... The first planet orbiting a star other than our Sun (or 'exoplanet') was discovered in 1992, orbiting an odd type of star known as a pulsar. It wasn't until three years later that the next exoplanet was discovered, this time around a star similar to our Sun. Since then the number of exoplanets we ha ...
... The first planet orbiting a star other than our Sun (or 'exoplanet') was discovered in 1992, orbiting an odd type of star known as a pulsar. It wasn't until three years later that the next exoplanet was discovered, this time around a star similar to our Sun. Since then the number of exoplanets we ha ...
10438 starlight - The Described and Captioned Media Program
... Our knowledge of stars is the result of a complex interplay and flow of facts, ideas, and models among several areas of study: observational astronomy, mechanics, spectroscopy, radiation physics, nuclear physics, and theoretical physics. In this program, viewers examine how our basic knowledge abou ...
... Our knowledge of stars is the result of a complex interplay and flow of facts, ideas, and models among several areas of study: observational astronomy, mechanics, spectroscopy, radiation physics, nuclear physics, and theoretical physics. In this program, viewers examine how our basic knowledge abou ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... They revealed themselves when Steven S. Vogt, astrophysics professor at UC Santa Cruz, and his collaborators were testing a new noise-analysis method on spectrometer data to calibrate their technique. Indeed, the team of 15 astronomers from seven institutions on four continents had picked Tau Ceti s ...
... They revealed themselves when Steven S. Vogt, astrophysics professor at UC Santa Cruz, and his collaborators were testing a new noise-analysis method on spectrometer data to calibrate their technique. Indeed, the team of 15 astronomers from seven institutions on four continents had picked Tau Ceti s ...
The Universe
... spectrum. The blank spaces (absorption lines) in the spectrum below represent different elements in that star ...
... spectrum. The blank spaces (absorption lines) in the spectrum below represent different elements in that star ...
Distance Ladder
... How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
... How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
Station A Star Charts I
... D7. (2 pts) One of the most luminous stars in the Milky Way is Cygnus OB2#12. Based on its size and distance from the Earth astronomers expect that its apparent magnitude should be 1.5. However, interstellar dust causes its apparent magnitude to be 11.4. How many times brighter (or fainter) does the ...
... D7. (2 pts) One of the most luminous stars in the Milky Way is Cygnus OB2#12. Based on its size and distance from the Earth astronomers expect that its apparent magnitude should be 1.5. However, interstellar dust causes its apparent magnitude to be 11.4. How many times brighter (or fainter) does the ...
Stars: Binary Systems
... radial velocity is only a fraction of the actual radial velocity since vobs = vr sin i, where i is the angle of inclination. The angle of inclination, i, is measured from the line of sight to the normal of the orbital plane. i = 90o would be an edge on system. i = 0o would be a face-on system which ...
... radial velocity is only a fraction of the actual radial velocity since vobs = vr sin i, where i is the angle of inclination. The angle of inclination, i, is measured from the line of sight to the normal of the orbital plane. i = 90o would be an edge on system. i = 0o would be a face-on system which ...
Which object is closest to Earth
... are so large that the orbits of the planets in our solar system would easily fit inside them. Stars are grouped together in galaxies covering vast distances. Galaxies contain from 100 billion to over 300 billion stars. Astronomers have discovered billions of galaxies in the universe. 25) Arrange the ...
... are so large that the orbits of the planets in our solar system would easily fit inside them. Stars are grouped together in galaxies covering vast distances. Galaxies contain from 100 billion to over 300 billion stars. Astronomers have discovered billions of galaxies in the universe. 25) Arrange the ...
Teacher Demo: Bright Star or Close Star?
... toward them. It should be far enough away that it appears less bright than the low-wattage flashlight. Turn on both flashlights and darken the room. Invite the students to compare the brightness of the flashlights. Now move the larger flashlight closer. What happens to the brightness? Set the larger ...
... toward them. It should be far enough away that it appears less bright than the low-wattage flashlight. Turn on both flashlights and darken the room. Invite the students to compare the brightness of the flashlights. Now move the larger flashlight closer. What happens to the brightness? Set the larger ...
Physics Observing The Universe
... The moon • The moon appears to travel east to west across the sky once every 24hrs 49mins. One complete cycle takes 28days. • Why does the Moon take longer to cross the sky than the Sun? • Because it orbits the Earth in the same direction as the Earth rotates. So by the time the Earth rotates enoug ...
... The moon • The moon appears to travel east to west across the sky once every 24hrs 49mins. One complete cycle takes 28days. • Why does the Moon take longer to cross the sky than the Sun? • Because it orbits the Earth in the same direction as the Earth rotates. So by the time the Earth rotates enoug ...
Astronomy Library wk 7.cwk (WP)
... In a degenerate gas some electrons must occupy higher energy levels because there are no lower energy levels available. Even at low temperatures (even absolute zero), these electrons will have considerable energy, moving about quickly. This energy and motion creates an outward pressure—electron dege ...
... In a degenerate gas some electrons must occupy higher energy levels because there are no lower energy levels available. Even at low temperatures (even absolute zero), these electrons will have considerable energy, moving about quickly. This energy and motion creates an outward pressure—electron dege ...
Distance - courses.psu.edu
... 6. A certain star is known to be equal in luminosity to the Sun, but its measured flux is only 1/10,000 (one ten-thousandth) the Sun's flux. What would be the distance to this star, in AU? 7. Two stars, A and B, are known to be equal in luminosity, but A appears 16 times brighter (as viewed from Ear ...
... 6. A certain star is known to be equal in luminosity to the Sun, but its measured flux is only 1/10,000 (one ten-thousandth) the Sun's flux. What would be the distance to this star, in AU? 7. Two stars, A and B, are known to be equal in luminosity, but A appears 16 times brighter (as viewed from Ear ...
Homework 1 SOLUTIONS - University of Colorado Boulder
... 1. All stars are called “fixed stars” because they are all at fixed celestial locations. This means that at any one specific location on Earth they have fixed rising and setting locations (setting locations ALWAYS symmetrical to rising locations around the meridian) and a fixed angle with respect to ...
... 1. All stars are called “fixed stars” because they are all at fixed celestial locations. This means that at any one specific location on Earth they have fixed rising and setting locations (setting locations ALWAYS symmetrical to rising locations around the meridian) and a fixed angle with respect to ...
LIGHT VS. DISTANCE
... Star: L = 2.8 x 1026 watts, d = 2500 LY, B = ? Star: B = 8.2 x 10-16 w/m2, L = 5.6 x 1030 watts, d = ? (LY and pc) ...
... Star: L = 2.8 x 1026 watts, d = 2500 LY, B = ? Star: B = 8.2 x 10-16 w/m2, L = 5.6 x 1030 watts, d = ? (LY and pc) ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.