A time travel of 14 billion years
... Edwin Hubble was a man who changed our view of the Universe. In 1929 he showed that galaxies are moving away from us with a speed proportional to their distance. The explanation is simple, but revolutionary: the Universe is expanding. Hubble was born in Missouri in 1889. His family moved to Chicago ...
... Edwin Hubble was a man who changed our view of the Universe. In 1929 he showed that galaxies are moving away from us with a speed proportional to their distance. The explanation is simple, but revolutionary: the Universe is expanding. Hubble was born in Missouri in 1889. His family moved to Chicago ...
What is the Shape of the Universe?
... single point – a degenerate S0) getting farther and farther apart until they reach a maximum distance (at the equator), thereafter getting increasingly close until they come together at the south pole (again a ...
... single point – a degenerate S0) getting farther and farther apart until they reach a maximum distance (at the equator), thereafter getting increasingly close until they come together at the south pole (again a ...
Chapter 14
... from iron up to uranium. These elements are then spread into space as dust which became the materials of which planets were made. • The force of gravitational attraction provided the initial energy for the whole process. ...
... from iron up to uranium. These elements are then spread into space as dust which became the materials of which planets were made. • The force of gravitational attraction provided the initial energy for the whole process. ...
Lab #10 (Apr 10-13)
... study of the solar system and our galaxy. In the earlier Venus lab, we learned about the story of Captain Cook’s expedition to Tahiti. Part of his mission was to measure the timing of the transit of Venus across the Sun. While Cook was making his measurements, astronomers were also timing the transi ...
... study of the solar system and our galaxy. In the earlier Venus lab, we learned about the story of Captain Cook’s expedition to Tahiti. Part of his mission was to measure the timing of the transit of Venus across the Sun. While Cook was making his measurements, astronomers were also timing the transi ...
The Milky Way Galaxy - Academic Computer Center
... made for the size of the galaxy and the position of the Sun within it. • It was found that certain dense clusters of stars known as globular clusters tended to be distributed in an elliptical region of space. The center would indicate the center of the galaxy. • The Sun was found not to be at the ce ...
... made for the size of the galaxy and the position of the Sun within it. • It was found that certain dense clusters of stars known as globular clusters tended to be distributed in an elliptical region of space. The center would indicate the center of the galaxy. • The Sun was found not to be at the ce ...
the stars
... magnitude versus spectral type and obtained the diagram. Today we can use the Virtual Observatory tools, so we do not need to perform astronomical observations during the night. We will observe in Stellarium the 25 brightest stars of the sky and then plot their spectral type versus absolute magnitud ...
... magnitude versus spectral type and obtained the diagram. Today we can use the Virtual Observatory tools, so we do not need to perform astronomical observations during the night. We will observe in Stellarium the 25 brightest stars of the sky and then plot their spectral type versus absolute magnitud ...
Cepheid variable stars
... Observatory to determine the magnitude of stars from photographic plates. As part of this project, she discovered more than 2400 variable stars. Looking at the variable stars that she had discovered in the Small Magellanic Cloud, Leavitt noticed that Cepheids with long pulsation periods were intrins ...
... Observatory to determine the magnitude of stars from photographic plates. As part of this project, she discovered more than 2400 variable stars. Looking at the variable stars that she had discovered in the Small Magellanic Cloud, Leavitt noticed that Cepheids with long pulsation periods were intrins ...
Photons
... The Vega system defines a set of A0V stars as having apparent magnitude 0 in all bands of a system The Johnson-Cousins-Glass system is a Vega system, where the magnitudes of all bands in the system are set to 0 for an idealized A0V star at ≈8 pc Another common magnitude zeropoint system is the AB s ...
... The Vega system defines a set of A0V stars as having apparent magnitude 0 in all bands of a system The Johnson-Cousins-Glass system is a Vega system, where the magnitudes of all bands in the system are set to 0 for an idealized A0V star at ≈8 pc Another common magnitude zeropoint system is the AB s ...
27.1: Characteristics of Stars
... About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scales to describe the brightness of a star: apparent magnitude and abso ...
... About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scales to describe the brightness of a star: apparent magnitude and abso ...
Stars: radius and mass
... Stars come in a variety of sizes • If we know luminosity and temperature, then we can find the radius: L = 4R2T4 • Small stars will have low luminosities unless they are very hot. • Stars with low surface temperatures must be very large in order to have large luminosities. ...
... Stars come in a variety of sizes • If we know luminosity and temperature, then we can find the radius: L = 4R2T4 • Small stars will have low luminosities unless they are very hot. • Stars with low surface temperatures must be very large in order to have large luminosities. ...
Mr. Traeger`s Light and Stars PowerPoint
... magnitude, relative brightness increases by 2.5 times. magnitude ...
... magnitude, relative brightness increases by 2.5 times. magnitude ...
Announcements
... Other evidence for Dark Matter 1. Rotation of galaxies 2. Motions in clusters of galaxies 3. Hot x-ray emitting gas in clusters of galaxies 4. Gravitational lensing ...
... Other evidence for Dark Matter 1. Rotation of galaxies 2. Motions in clusters of galaxies 3. Hot x-ray emitting gas in clusters of galaxies 4. Gravitational lensing ...
2017 New Jersey Science Olympiad Union County College
... An object is found to have its spectral line for Element X at 4000 Angstroms while the wavelength of Element X at rest is 3900 Angstroms. (A) What is the object’s spectroscopic redshift?(B) Derive the Hubble constant from the redshift derived in part A given the distance to the object is 10 parsecs. ...
... An object is found to have its spectral line for Element X at 4000 Angstroms while the wavelength of Element X at rest is 3900 Angstroms. (A) What is the object’s spectroscopic redshift?(B) Derive the Hubble constant from the redshift derived in part A given the distance to the object is 10 parsecs. ...
Whirlpool Galaxy - astronomydennis
... At the center of the Whirlpool galaxy is its noted cross. The cross has been thought to have been caused by a jet of high speed plasma which confines radiation from the accretion disk to a pair of oppositely directed cones of light that ionize gas caught in their beams. In simple terms, it is the ab ...
... At the center of the Whirlpool galaxy is its noted cross. The cross has been thought to have been caused by a jet of high speed plasma which confines radiation from the accretion disk to a pair of oppositely directed cones of light that ionize gas caught in their beams. In simple terms, it is the ab ...
General relativistic cosmology
... Use the binomial series expansion for the square root, keeping just first-order terms in z: dL ...
... Use the binomial series expansion for the square root, keeping just first-order terms in z: dL ...
stars
... • Stars change over their lifespan just like animals change throughout their life. • Nebula-a large cloud of gas and dust spread out over a large volume of space. • They can have different appearances bright or dark ...
... • Stars change over their lifespan just like animals change throughout their life. • Nebula-a large cloud of gas and dust spread out over a large volume of space. • They can have different appearances bright or dark ...
proposed research projects for pparc gemini studentships
... systems to establish the links between the properties of their stellar populations (ages and chemical abundances) and their kinematic properties (masses and dynamics). GEMINI spectroscopy will allow us to measure kinematics and line strengths out to large radii. We will combine this information with ...
... systems to establish the links between the properties of their stellar populations (ages and chemical abundances) and their kinematic properties (masses and dynamics). GEMINI spectroscopy will allow us to measure kinematics and line strengths out to large radii. We will combine this information with ...
Cepheid
... All the stars in the LMC look rather faint because it is 150,000 light-years away! (Still, this is less than 10% of the distance to the Andromeda nebula, M31.) But in the LMC, the member stars are at a common distance, so any differences are meaningful and real. ...
... All the stars in the LMC look rather faint because it is 150,000 light-years away! (Still, this is less than 10% of the distance to the Andromeda nebula, M31.) But in the LMC, the member stars are at a common distance, so any differences are meaningful and real. ...
Formation of the Oort Cloud28 Mar Assignment for Fri •
... Infrared: NASA; K.L. Luhman (Harvard‐Smithsonian Center for Astrophysics); & G. Schneider, E. Young, G. Rieke, A. Cotera, H. Chen, M. Rieke, R. Thompson (Steward Observatory) ...
... Infrared: NASA; K.L. Luhman (Harvard‐Smithsonian Center for Astrophysics); & G. Schneider, E. Young, G. Rieke, A. Cotera, H. Chen, M. Rieke, R. Thompson (Steward Observatory) ...
2017 Div. C (High School) Astronomy Help Session
... White dwarfs (oxygen & helium) -1 • White dwarfs are the end point for moderate mass stars like our sun: Mass ~0.5 to ~4+x mass of sun (Msun) the progenitor stars are not massive enough to generate neutron stars or black holes when they die. • White dwarfs do not generate any energy – they are ju ...
... White dwarfs (oxygen & helium) -1 • White dwarfs are the end point for moderate mass stars like our sun: Mass ~0.5 to ~4+x mass of sun (Msun) the progenitor stars are not massive enough to generate neutron stars or black holes when they die. • White dwarfs do not generate any energy – they are ju ...
100 million years after the Big Bang
... This talk focuses on classical bulges and their possible formation in the first few hundred million years A 10 solar mass star forming 100 Myr after the Big Bang would be seen today with a Balmer Jump at 11 and a Lyman limit at 2.7 . Such early stars, if they formed at all, are JWST targets ...
... This talk focuses on classical bulges and their possible formation in the first few hundred million years A 10 solar mass star forming 100 Myr after the Big Bang would be seen today with a Balmer Jump at 11 and a Lyman limit at 2.7 . Such early stars, if they formed at all, are JWST targets ...
Sample Final
... 28. Which of the following best describes the Big Bang Theory? a) The Universe is eternal, infinite in size, and static. b) As the Universe expands, matter is continuously created to keep the average density constant. c) The Universe arose at the same time as the Earth and is about 6000 years old. d ...
... 28. Which of the following best describes the Big Bang Theory? a) The Universe is eternal, infinite in size, and static. b) As the Universe expands, matter is continuously created to keep the average density constant. c) The Universe arose at the same time as the Earth and is about 6000 years old. d ...
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.