PH109 Exploring the Universe, Test 3, Fall 2001 Please indicate the
... Please indicate the best answer to the following questions on the answer sheet provided. 1. Magnetic fields inside sunspots are __________ those in surrounding regions. a) much stronger than, b) slightly stronger than, c) the same as, d) much weaker than 2. The temperature of the layer of gas that p ...
... Please indicate the best answer to the following questions on the answer sheet provided. 1. Magnetic fields inside sunspots are __________ those in surrounding regions. a) much stronger than, b) slightly stronger than, c) the same as, d) much weaker than 2. The temperature of the layer of gas that p ...
THE LIFE CYCLE OF A STAR
... a million years before exploding as supernovae. The faintest stars are the red dwarfs, less than onethousandth the brightness of the Sun. The smallest mass possible for a star is about 8% that of the Sun (80 times the mass of the planet Jupiter), otherwise nuclear reactions do not take place. Object ...
... a million years before exploding as supernovae. The faintest stars are the red dwarfs, less than onethousandth the brightness of the Sun. The smallest mass possible for a star is about 8% that of the Sun (80 times the mass of the planet Jupiter), otherwise nuclear reactions do not take place. Object ...
Powers of ten notation
... of 24 hours between successive meridian crossings. The difference is due to Earth’s revolution about the Sun. The Sun moves on average 4 minutes eastward each day relative to the stars, staying in the sky longer each day than a star at the same declination. ...
... of 24 hours between successive meridian crossings. The difference is due to Earth’s revolution about the Sun. The Sun moves on average 4 minutes eastward each day relative to the stars, staying in the sky longer each day than a star at the same declination. ...
PHYS 390 Lecture 31 - Kinematics of galaxies 31
... Galaxies assume a variety of shapes, but certainly one of the more common shapes is a spiral or pinwheel: ...
... Galaxies assume a variety of shapes, but certainly one of the more common shapes is a spiral or pinwheel: ...
Wavelength
... to them in units of the distance traveled by light in one year. This unit is called a light year. The next closest star to us is Proxima Centauri. This star is 4.3 light years away which means that light from it takes 4.3 years to reach us. Our galaxy is about 100,000 light years across. This means ...
... to them in units of the distance traveled by light in one year. This unit is called a light year. The next closest star to us is Proxima Centauri. This star is 4.3 light years away which means that light from it takes 4.3 years to reach us. Our galaxy is about 100,000 light years across. This means ...
January 2016 - Newbury Astronomical Society
... left. The curved green line across the sky is the Ecliptic or Zodiac. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through which the ecliptic passes are known as the constellations of the ‘Zodiac’. Taurus is prominent in the south ...
... left. The curved green line across the sky is the Ecliptic or Zodiac. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through which the ecliptic passes are known as the constellations of the ‘Zodiac’. Taurus is prominent in the south ...
Neutron Stars - Otterbein University
... together • Protons combine with electrons to form neutrons • Ultimately the collapse is halted by neutron pressure, the core is composed of neutrons ...
... together • Protons combine with electrons to form neutrons • Ultimately the collapse is halted by neutron pressure, the core is composed of neutrons ...
PPT file
... When their fuel is used up, these massive stars become supergiants Before long, they collapse in on themselves causing a massive explosion called a supernova This is important as it spreads heavy elements out through space. ...
... When their fuel is used up, these massive stars become supergiants Before long, they collapse in on themselves causing a massive explosion called a supernova This is important as it spreads heavy elements out through space. ...
A Star is Born!
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on composition (He and heavier elements) ...
... • The Zero Age Main Sequence (ZAMS) represents the onset or start of nuclear burning (fusion) • The properties of a star on the ZAMS are primarily determined by its mass, somewhat dependent on composition (He and heavier elements) ...
Friday, April 25 - Otterbein University
... Discovering other Island Universes • Data: Lots of nebulous spots known in the night sky • Questions: What are they? All the same? Different things? • Need more observations! Build bigger telescopes ...
... Discovering other Island Universes • Data: Lots of nebulous spots known in the night sky • Questions: What are they? All the same? Different things? • Need more observations! Build bigger telescopes ...
Physical Science Lecture Notes
... b. Radio Telescope: Uses a large parabolic dish to collect and focus radio waves 3. Spectrographs: break light into its visible components a. Astronomers use spectrograths to determine temperatures and chemical composition of the stars they are looking at. B. Characteristics of Stars 1. Constellatio ...
... b. Radio Telescope: Uses a large parabolic dish to collect and focus radio waves 3. Spectrographs: break light into its visible components a. Astronomers use spectrograths to determine temperatures and chemical composition of the stars they are looking at. B. Characteristics of Stars 1. Constellatio ...
Problem Set #3
... a. Is your galaxy in solid body rotation? How do you know? b. What is the local rotation speed at your position? c. Is the rotation curve locally flat? How do you know? d. What is the mass of the Galaxy contained within R0? e. Do you think this Galaxy is likely to be more or less massive than the Mi ...
... a. Is your galaxy in solid body rotation? How do you know? b. What is the local rotation speed at your position? c. Is the rotation curve locally flat? How do you know? d. What is the mass of the Galaxy contained within R0? e. Do you think this Galaxy is likely to be more or less massive than the Mi ...
Galaxy Questions Info
... containing spiral arms, and a halo. Elliptical galaxies have a bulgeshape and a halo, but do not have a disk. Bulge — A round structure made primarily of old stars, gas, and dust. The bulge of the Milky Way is roughly 10,000 light-years across. The outer parts of the bulge are difficult to distingui ...
... containing spiral arms, and a halo. Elliptical galaxies have a bulgeshape and a halo, but do not have a disk. Bulge — A round structure made primarily of old stars, gas, and dust. The bulge of the Milky Way is roughly 10,000 light-years across. The outer parts of the bulge are difficult to distingui ...
A Star is a ball of matter that is pulled together by gravity, and that
... How bright a star is when viewed from___________. A very large, hot star could look dim just because it is so far away. •_____________________Magnitude: the amount of ____________ that is actually given off by a star. 4. Measuring the Distance to Stars: we measure the distance between objects in spa ...
... How bright a star is when viewed from___________. A very large, hot star could look dim just because it is so far away. •_____________________Magnitude: the amount of ____________ that is actually given off by a star. 4. Measuring the Distance to Stars: we measure the distance between objects in spa ...
chapter 17 measuring the stars
... (including the Sun itself) ~The color of any 24, 000 K object glows white o White Dwarf: A dwarf star with sufficiently high surface temperature that it glows white ...
... (including the Sun itself) ~The color of any 24, 000 K object glows white o White Dwarf: A dwarf star with sufficiently high surface temperature that it glows white ...
Astrobio
... We can use the law of gravity to measure how much mass is within our galactic orbit. Vc = velocity of sun around galactic center r = distance from sun to galactic center ...
... We can use the law of gravity to measure how much mass is within our galactic orbit. Vc = velocity of sun around galactic center r = distance from sun to galactic center ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.