The Carina Dwarf Spheroidal Galaxy: A Goldmine for Cosmology
... satellite populations significantly larger than the number of dwarfs observed near giant spirals like the Milky Way and M31. This discrepancy is known as the missing satellite problem and challenges the current most popular cosmological model: the Lambda Cold Dark Matter paradigm (Madau et al., 200 ...
... satellite populations significantly larger than the number of dwarfs observed near giant spirals like the Milky Way and M31. This discrepancy is known as the missing satellite problem and challenges the current most popular cosmological model: the Lambda Cold Dark Matter paradigm (Madau et al., 200 ...
ps700-coll1-hayden
... recent example of the Shoe Maker comet hitting Jupiter. There are also many other factors such as correct planetary size to hold on to an atmosphere, stable planetary orbit and favourable plate tectonics that all facilitate the growth of basic and intelligent life. On the next page is a basic summar ...
... recent example of the Shoe Maker comet hitting Jupiter. There are also many other factors such as correct planetary size to hold on to an atmosphere, stable planetary orbit and favourable plate tectonics that all facilitate the growth of basic and intelligent life. On the next page is a basic summar ...
Stellar Physics - Craigie High School
... is also a lot of information on the major contributors over the centuries to our knowledge of gravitation. A brief historical note on these people follows. Claudius Ptolemy (A.D. 120) assumed the Earth was immovable and tried to explain the strange motion of various stars and planets on that basis. ...
... is also a lot of information on the major contributors over the centuries to our knowledge of gravitation. A brief historical note on these people follows. Claudius Ptolemy (A.D. 120) assumed the Earth was immovable and tried to explain the strange motion of various stars and planets on that basis. ...
Astronomy news
... "We caught this otherwise ordinary star in a unique stage in its evolution, toward the end of its life when it has bloated into a red giant phase. As a result, gas from the star is spilling into the black hole, causing the whole region to light up." said Prof. Philip Kaaret. "We found a rise and fal ...
... "We caught this otherwise ordinary star in a unique stage in its evolution, toward the end of its life when it has bloated into a red giant phase. As a result, gas from the star is spilling into the black hole, causing the whole region to light up." said Prof. Philip Kaaret. "We found a rise and fal ...
CMU3 - Fast and Simple High-Resolution Optical Spectrum Analyzer
... where the optical bandwidth is transformed into the electrical domain by the beating between the signal and a phase delayed copy of it. In this case the transformed signal can be measured by a PIN photodiode and a radio frequency spectrum analyzer. In [3] and [4] a new measurement method was describ ...
... where the optical bandwidth is transformed into the electrical domain by the beating between the signal and a phase delayed copy of it. In this case the transformed signal can be measured by a PIN photodiode and a radio frequency spectrum analyzer. In [3] and [4] a new measurement method was describ ...
feb24
... The third rule tells you something about the kind of radiation emitted by an object. We will see that objects usually emit radiation at many different wavelengths but not in equal amounts. But, objects emit more of one particular wavelength than any of the others. This is called λmax ("lambda max", ...
... The third rule tells you something about the kind of radiation emitted by an object. We will see that objects usually emit radiation at many different wavelengths but not in equal amounts. But, objects emit more of one particular wavelength than any of the others. This is called λmax ("lambda max", ...
Radial Stellar Pulsations
... when expanded (at lower temperature), then the net work done is positive. In the Carnot engine described above, heat and entropy are gained or lost only when the gas is in contact with a heat bath. At the center of a star, however, heat and entropy are continually produced by nuclear reactions. In e ...
... when expanded (at lower temperature), then the net work done is positive. In the Carnot engine described above, heat and entropy are gained or lost only when the gas is in contact with a heat bath. At the center of a star, however, heat and entropy are continually produced by nuclear reactions. In e ...
External Occulters for the Direct Study of Exoplanets
... chemistry associated with it. Is it necessarily similar to our own? ...
... chemistry associated with it. Is it necessarily similar to our own? ...
Lecture 2
... Scanning Electron Microscopy (SEM): electrons bounce off the surface of specimen resulting in a more 3-D image. ...
... Scanning Electron Microscopy (SEM): electrons bounce off the surface of specimen resulting in a more 3-D image. ...
Ionized gas discs in elliptical and S0 galaxies at z < 1
... the S0 TFR. They extensively analyse biases and obtain a smaller (but still significant) TFR offset than in Bedregal et al. (2006). They conclude from their study that this offset can be explained if S0s are systematically smaller or more concentrated than spirals. However, ...
... the S0 TFR. They extensively analyse biases and obtain a smaller (but still significant) TFR offset than in Bedregal et al. (2006). They conclude from their study that this offset can be explained if S0s are systematically smaller or more concentrated than spirals. However, ...
Meteroroids! Asteroids! Comets!
... Nucleus: The nucleus is the frozen center of a comet’s head. It is composed of ice, gas, and dust. Coma: The coma is a blob of gas that surrounds the nucleus of a comet; The coma is composed of water vapor, carbon dioxide gas, ammonia, and dust. Gas Tail: A tail of charged gases (ions) always faces ...
... Nucleus: The nucleus is the frozen center of a comet’s head. It is composed of ice, gas, and dust. Coma: The coma is a blob of gas that surrounds the nucleus of a comet; The coma is composed of water vapor, carbon dioxide gas, ammonia, and dust. Gas Tail: A tail of charged gases (ions) always faces ...
Meteroroids! Asteroids! Comets!
... Nucleus: The nucleus is the frozen center of a comet’s head. It is composed of ice, gas, and dust. Coma: The coma is a blob of gas that surrounds the nucleus of a comet; The coma is composed of water vapor, carbon dioxide gas, ammonia, and dust. Gas Tail: A tail of charged gases (ions) always faces ...
... Nucleus: The nucleus is the frozen center of a comet’s head. It is composed of ice, gas, and dust. Coma: The coma is a blob of gas that surrounds the nucleus of a comet; The coma is composed of water vapor, carbon dioxide gas, ammonia, and dust. Gas Tail: A tail of charged gases (ions) always faces ...
Pictures in the Stars, Legends in the Sky
... supergiant star in the Milky Way galaxy. Its diameter is about 700 times larger than our sun! If Antares replaced our sun in the center of our solar system, it would extend past the orbit of Mars! ...
... supergiant star in the Milky Way galaxy. Its diameter is about 700 times larger than our sun! If Antares replaced our sun in the center of our solar system, it would extend past the orbit of Mars! ...
A Journey... Back To The Beginning of Time!
... display about the origin and evolution of the universe. This is part of an ongoing project to capture students interest in science. They have asked local area high school students to participate by creating a presentation that will educate visitors about Cosmology and the origin of stars and stellar ...
... display about the origin and evolution of the universe. This is part of an ongoing project to capture students interest in science. They have asked local area high school students to participate by creating a presentation that will educate visitors about Cosmology and the origin of stars and stellar ...
Eric Tener - FSU High Energy Physics
... Newton’s three laws. However new types of experiments were being done in the mid 1800’s that would change the way scientist thought of classical physics. One of these experiments involved measuring the thermal radiation of a blackbody. The conclusions of such experiments lead to the foundation of qu ...
... Newton’s three laws. However new types of experiments were being done in the mid 1800’s that would change the way scientist thought of classical physics. One of these experiments involved measuring the thermal radiation of a blackbody. The conclusions of such experiments lead to the foundation of qu ...
The Search for Reflected Light
... of star + planet in the visual! → approx. 2300 stellar absorption lines + → these lines reflected by the planet, BUT - Doppler shifted due to orbital motion - faint (a few times 1/10000 ) ...
... of star + planet in the visual! → approx. 2300 stellar absorption lines + → these lines reflected by the planet, BUT - Doppler shifted due to orbital motion - faint (a few times 1/10000 ) ...
Atoms, Molecules and Optical Physics 1 and 2
... view point. Chapter 19 gives a down to earth manual for using the density matrix. It also gives a brief look on the theory of measurement, including a powerful method to analyze radiation patterns from anisotropically populated mixtures of excited states. Finally, making use of these concepts, an in ...
... view point. Chapter 19 gives a down to earth manual for using the density matrix. It also gives a brief look on the theory of measurement, including a powerful method to analyze radiation patterns from anisotropically populated mixtures of excited states. Finally, making use of these concepts, an in ...
The Northern sky - Visit Isle of Man
... The Plough The Plough, also known as the Big Dipper, is a collection of seven stars that has been recognised as a distinct grouping in many cultures for thousands of years. The stars that make up the Plough are the seven brightest stars of the Ursa Major constellation. In the days before we had comp ...
... The Plough The Plough, also known as the Big Dipper, is a collection of seven stars that has been recognised as a distinct grouping in many cultures for thousands of years. The stars that make up the Plough are the seven brightest stars of the Ursa Major constellation. In the days before we had comp ...
Hubble Offers a Dazzling View of Necklace Nebula
... miles wide and dotted with pearls of glowing gas. The object is the glowing remains of an ordinary, Sun-like star, called a planetary nebula. What’s in a name? The planetary nebula name is a misnomer because these objects have nothing to do with planets. They acquired their name more than 100 years ...
... miles wide and dotted with pearls of glowing gas. The object is the glowing remains of an ordinary, Sun-like star, called a planetary nebula. What’s in a name? The planetary nebula name is a misnomer because these objects have nothing to do with planets. They acquired their name more than 100 years ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.