Document
... b. the sun is one of many stars in our own Milky Way galaxy. Stars may differ in size, temperature, and color. ...
... b. the sun is one of many stars in our own Milky Way galaxy. Stars may differ in size, temperature, and color. ...
Our Galaxy, The Milky Way
... Stellar Kinematics Near the Sun • Velocity dispersion of stars increases with their mean age: the evidence for a stochastic acceleration due to GMC and spiral arm encounters in a differentially rotating Galaxy • The shape of the velocity ellipsoid also changes: older stars rotate more slowly; the t ...
... Stellar Kinematics Near the Sun • Velocity dispersion of stars increases with their mean age: the evidence for a stochastic acceleration due to GMC and spiral arm encounters in a differentially rotating Galaxy • The shape of the velocity ellipsoid also changes: older stars rotate more slowly; the t ...
Cosmic Surveyor
... suddenly wondered how Newtonian gravitation would have to be modified to fit in with special relativity. At this point there occurred to Einstein, described by him as the happiest thought of my life , namely that an observer who is falling from the roof of a house experiences no gravitational field. ...
... suddenly wondered how Newtonian gravitation would have to be modified to fit in with special relativity. At this point there occurred to Einstein, described by him as the happiest thought of my life , namely that an observer who is falling from the roof of a house experiences no gravitational field. ...
Stellar Explosions
... be seen is similar to the range of sounds that are too low for the human ear to hear. Infrared light can be detected as the heat from a fire or a light bulb. ...
... be seen is similar to the range of sounds that are too low for the human ear to hear. Infrared light can be detected as the heat from a fire or a light bulb. ...
DP11 Foundations of Astronomy
... limited in scope to fairly nearby stars, but we base our whole understanding of cosmic distances on what we find out from the closest stars with directly measured distances. The HIPPARCOS satellite measured stellar positions to an accuracy of 0.001 arcseconds, so the current limit of parallax measur ...
... limited in scope to fairly nearby stars, but we base our whole understanding of cosmic distances on what we find out from the closest stars with directly measured distances. The HIPPARCOS satellite measured stellar positions to an accuracy of 0.001 arcseconds, so the current limit of parallax measur ...
Galaxy classification
... The nearest rich cluster is Virgo cluster. Super cluster contains nearly 12 clusters. ...
... The nearest rich cluster is Virgo cluster. Super cluster contains nearly 12 clusters. ...
A105 Stars and Galaxies - Department of Astronomy
... Why do the constellations we see depend on latitude and time of year? They depend on latitude because your position on Earth determines which constellations remain below the horizon. They depend on time of year because Earth’s orbit changes the apparent location of the Sun among the stars. ...
... Why do the constellations we see depend on latitude and time of year? They depend on latitude because your position on Earth determines which constellations remain below the horizon. They depend on time of year because Earth’s orbit changes the apparent location of the Sun among the stars. ...
9 Measuring the properties of stars - Journigan-wiki
... Wondering as You Look at the Stars It’s impossible not to wonder as you look at the stars. What would that star look like if you were close to it? How hot is that star? What is that star made of? Yet, scientists have developed ways to answer many of these questions. Kepler gives us star’s masses, W ...
... Wondering as You Look at the Stars It’s impossible not to wonder as you look at the stars. What would that star look like if you were close to it? How hot is that star? What is that star made of? Yet, scientists have developed ways to answer many of these questions. Kepler gives us star’s masses, W ...
Name
... Equipment: sextant, double meter sticks Objective: to become familiar with using vector sums and trigonometric methods to measure heights and distances Procedure: 1. How to use a sextant: This is an instrument that enables you to establish the angle between two visually notable objects that appear s ...
... Equipment: sextant, double meter sticks Objective: to become familiar with using vector sums and trigonometric methods to measure heights and distances Procedure: 1. How to use a sextant: This is an instrument that enables you to establish the angle between two visually notable objects that appear s ...
The Sun The Sun is a very typical main sequence star. It contains 1000
... can reveal the existence of about 2 million stars. We now know that the Milky Way galaxy contains around 100 billion (1011) stars. We have previously discussed how parallax measurements can determine th ...
... can reveal the existence of about 2 million stars. We now know that the Milky Way galaxy contains around 100 billion (1011) stars. We have previously discussed how parallax measurements can determine th ...
earth - University of Arizona
... • Science of the nature of everything outside of the Earth’s atmosphere: planets, stars, interstellar gas, galaxies, etc. • What is the content of the Universe? – What is its history? What is ...
... • Science of the nature of everything outside of the Earth’s atmosphere: planets, stars, interstellar gas, galaxies, etc. • What is the content of the Universe? – What is its history? What is ...
ET_at_Science_Cafe
... • A Cepheid variable is a member of a particular class of variable stars, notable for tight correlation between their period of variability and absolute luminosity. • Namesake and prototype of these variables is the star Delta Cephei, discovered to be variable by John Goodricke in 1784. • This corre ...
... • A Cepheid variable is a member of a particular class of variable stars, notable for tight correlation between their period of variability and absolute luminosity. • Namesake and prototype of these variables is the star Delta Cephei, discovered to be variable by John Goodricke in 1784. • This corre ...
PPT - University of Arizona
... Because light takes time to travel through space, when we look farther away in distance, we look farther back in TIME. The farthest we can see in space is 13.7 billion light years, because we think the Universe is 13.7 billion years old. ...
... Because light takes time to travel through space, when we look farther away in distance, we look farther back in TIME. The farthest we can see in space is 13.7 billion light years, because we think the Universe is 13.7 billion years old. ...
Astronomy 201: Cosmology
... 1 light minute = the distance light travels in one minute 1 light year = the distance light travels in one year = almost 10 trillion kilometers or 6 trillion miles (one trillion = 1012 = 1,000,000,000,000) Because light takes time to travel through space, when we look farther away in distance, we l ...
... 1 light minute = the distance light travels in one minute 1 light year = the distance light travels in one year = almost 10 trillion kilometers or 6 trillion miles (one trillion = 1012 = 1,000,000,000,000) Because light takes time to travel through space, when we look farther away in distance, we l ...
Observation
... (on the CGRO, launched in 1991) BeppoSAX (launched in 1996/4/30)– provide a much more accurate location HETE– failed in 1996 ...
... (on the CGRO, launched in 1991) BeppoSAX (launched in 1996/4/30)– provide a much more accurate location HETE– failed in 1996 ...
70 Thousand Million, Million, Million Stars in Space
... A comet is not a star. It is formed by bits of dust and gas that collect into an icy form. Comets take their name from the Greek aster kometes, which means “long-haired stars.” Comets have come as close to Earth as 31,068,560 miles (50 million km). Asteroids are not stars. They are bits of rock that ...
... A comet is not a star. It is formed by bits of dust and gas that collect into an icy form. Comets take their name from the Greek aster kometes, which means “long-haired stars.” Comets have come as close to Earth as 31,068,560 miles (50 million km). Asteroids are not stars. They are bits of rock that ...
15-1 Notes - westscidept
... spectrum can be read to determine the ___________ in a star’s atmosphere. Stars are made of mostly ____________ and __________ gas, but have traces of many other elements. Stars are classified by how ______ they are, with blue stars being the __________ and ______ stars being the coolest. Stars are ...
... spectrum can be read to determine the ___________ in a star’s atmosphere. Stars are made of mostly ____________ and __________ gas, but have traces of many other elements. Stars are classified by how ______ they are, with blue stars being the __________ and ______ stars being the coolest. Stars are ...
Solar System
... • Optical telescopes have apertures much bigger than the wavelength of light to reduce diffraction and form sharp images. • Radio waves have long wavelengths. A telescope that detects radio waves from distant objects needs a very big aperture. ...
... • Optical telescopes have apertures much bigger than the wavelength of light to reduce diffraction and form sharp images. • Radio waves have long wavelengths. A telescope that detects radio waves from distant objects needs a very big aperture. ...
Document
... • A is incorrect because planets are celestial bodies that typically orbit stars. • B is correct because stars are large bodies of gas that give off light. • C is incorrect because some of the faint dots that can be seen from Earth’s surface are planets and comets. • D is incorrect because comets, n ...
... • A is incorrect because planets are celestial bodies that typically orbit stars. • B is correct because stars are large bodies of gas that give off light. • C is incorrect because some of the faint dots that can be seen from Earth’s surface are planets and comets. • D is incorrect because comets, n ...
here
... 1: Red dwarf (e.g., an M star) implies low-mass. Low-metallicity implies Pop II. Perpendicular through the disk implies not a disk-like orbit. Thus, this is likely an old, Pop II star from the stellar halo of the Milky Way. 2: Before Big Bang Nucleosynthesis, the universe was too hot for nuclei like ...
... 1: Red dwarf (e.g., an M star) implies low-mass. Low-metallicity implies Pop II. Perpendicular through the disk implies not a disk-like orbit. Thus, this is likely an old, Pop II star from the stellar halo of the Milky Way. 2: Before Big Bang Nucleosynthesis, the universe was too hot for nuclei like ...
Space astrometry 2: Scientific results from Hipparcos
... Fe cores difficult to reproduce from stellar models (Iben & Renzini 1983) Strange matter cores have been proposed by Panei et al (2000); Mathews (2006) ...
... Fe cores difficult to reproduce from stellar models (Iben & Renzini 1983) Strange matter cores have been proposed by Panei et al (2000); Mathews (2006) ...
Radial Stellar Pulsations
... Clearly ∆W > 0 along any clockwise closed path, not just those composed of adiabats and isotherms. Hence if the gas tends to gain entropy when it is compressed (at high temperature) and to lose it when expanded (at lower temperature), then the net work done is positive. In the Carnot engine describe ...
... Clearly ∆W > 0 along any clockwise closed path, not just those composed of adiabats and isotherms. Hence if the gas tends to gain entropy when it is compressed (at high temperature) and to lose it when expanded (at lower temperature), then the net work done is positive. In the Carnot engine describe ...
Stellar Populations Science
... need to observe several fields in any given galaxy to fully sample radial and stochastic variations in stellar populations – Determine their star formation and chemical enrichment histories, detailed chemical evolution, and kinematic distributions; through observations of resolved stars; look for di ...
... need to observe several fields in any given galaxy to fully sample radial and stochastic variations in stellar populations – Determine their star formation and chemical enrichment histories, detailed chemical evolution, and kinematic distributions; through observations of resolved stars; look for di ...
08 October: Stellar life after the Main Sequence
... As cores contract, the density goes to “astronomical” levels, matter acts in funny ways • Gas in this room, the “perfect gas law” PV=nRT. Pressure depends on both density and temperature • Extremely dense, “degenerate” gas PV=Kn. Pressure depends only on density • Demo ...
... As cores contract, the density goes to “astronomical” levels, matter acts in funny ways • Gas in this room, the “perfect gas law” PV=nRT. Pressure depends on both density and temperature • Extremely dense, “degenerate” gas PV=Kn. Pressure depends only on density • Demo ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.