ASTR3007/4007/6007, Class 1: Observing the Stars 23 February
... of luminosity we put total luminosity (or magnitude) as seen in some particular range of wavelengths, and in place of surface temperature we plot the ratio of the brightness seen through two different filters – this is a proxy for colour, and thus for surface temperature. For this reason, we sometim ...
... of luminosity we put total luminosity (or magnitude) as seen in some particular range of wavelengths, and in place of surface temperature we plot the ratio of the brightness seen through two different filters – this is a proxy for colour, and thus for surface temperature. For this reason, we sometim ...
Astronomical Knowledge Questionnaire (Student
... Please carefully read each question carefully and answer what you think is the most appropriate option with an ‘X’ in the box. If you do not know the answer to the question please select I do not know option. It does not matter if you do not know the answer, simply select the I do not know option an ...
... Please carefully read each question carefully and answer what you think is the most appropriate option with an ‘X’ in the box. If you do not know the answer to the question please select I do not know option. It does not matter if you do not know the answer, simply select the I do not know option an ...
Project Descriptions - UCI Physics and Astronomy
... smaller than stars, they are also much closer, which makes them appear as infinitely small, star-like objects when imaged with a telescope. This makes their identification confusing, as they can often be mistaken for stars. However, their close proximity to the Earth also makes their apparent motion ...
... smaller than stars, they are also much closer, which makes them appear as infinitely small, star-like objects when imaged with a telescope. This makes their identification confusing, as they can often be mistaken for stars. However, their close proximity to the Earth also makes their apparent motion ...
*Studying Complex Star-Forming Fields: Rosette Nebula and Monoceros Loop by Chris Hathaway and Anthony Kuchera
... located near one end of a giant molecular cloud (Rosette Molecular Cloud)—a place of ongoing star formation. The Monoceros Loop (a circular optical nebulosity /in the vicinity of the Rosette Nebula) is thought to be a supernova remnant (the final product of the evolution of a very massive star). Ros ...
... located near one end of a giant molecular cloud (Rosette Molecular Cloud)—a place of ongoing star formation. The Monoceros Loop (a circular optical nebulosity /in the vicinity of the Rosette Nebula) is thought to be a supernova remnant (the final product of the evolution of a very massive star). Ros ...
ASTROPHYSICS UNIVERSE - Physics
... of two stars orbiting around their centre of mass. For each star, the other is its companion star. A large percentage of stars are part of systems with at least two stars. Binary star systems are very important in astrophysics, because observing their mutual orbits allows their mass to be determined ...
... of two stars orbiting around their centre of mass. For each star, the other is its companion star. A large percentage of stars are part of systems with at least two stars. Binary star systems are very important in astrophysics, because observing their mutual orbits allows their mass to be determined ...
English Summary
... at a certain wavelength (or a certain colour). From laboratory measurements we know at what wavelength the elements emit. These wavelengths are normally very small and are measured in units such as nanometers (1 nm = 0.000000001 meters). Since the light that we see is a combination of many wavelengt ...
... at a certain wavelength (or a certain colour). From laboratory measurements we know at what wavelength the elements emit. These wavelengths are normally very small and are measured in units such as nanometers (1 nm = 0.000000001 meters). Since the light that we see is a combination of many wavelengt ...
Globular Clusters Dynamic Lives The
... image was taken with the Canada-France-Hawaii Telescope. Courtesy Peter B. Stetson, Dominion Astrophysical Observatory. Below: Many amateurs’ first acquaintance with globular clusters came courtesy the Messier catalog, named for its 18th-century author, Charles Messier. The Messier globulars depicte ...
... image was taken with the Canada-France-Hawaii Telescope. Courtesy Peter B. Stetson, Dominion Astrophysical Observatory. Below: Many amateurs’ first acquaintance with globular clusters came courtesy the Messier catalog, named for its 18th-century author, Charles Messier. The Messier globulars depicte ...
Laboratory Title
... After the helium in the core has all been converted into carbon, the core collapses again, and this time the outer layers are expelled into planetary nebula. The core remains as a white dwarf. No further nuclear reactions take place and eventually it will cool so that no light is seen. At that point ...
... After the helium in the core has all been converted into carbon, the core collapses again, and this time the outer layers are expelled into planetary nebula. The core remains as a white dwarf. No further nuclear reactions take place and eventually it will cool so that no light is seen. At that point ...
Physics: Principle and Applications, 7e (Giancoli) Chapter 33
... 5) A star has absolute luminosity equal to that of the sun but is 10 pc away from the Earth. By what factor will it appear dimmer than the sun? The earth is 1.5 × 108 km from the sun, and 1 parsec is equal to 3.09 × 1016 m. A) 2 × 10-9 B) 2 × 10-11 C) 2 × 10-13 D) 2 × 10-15 Answer: C Var: 1 6) The ...
... 5) A star has absolute luminosity equal to that of the sun but is 10 pc away from the Earth. By what factor will it appear dimmer than the sun? The earth is 1.5 × 108 km from the sun, and 1 parsec is equal to 3.09 × 1016 m. A) 2 × 10-9 B) 2 × 10-11 C) 2 × 10-13 D) 2 × 10-15 Answer: C Var: 1 6) The ...
Distance to the SMC
... Shapley in his calibration must be about 1.5 magnitudes fainter than the spiral arm Cepheids observed by Leavitt. That is, because Shapley based his scale on intrinsically fainter Population II stars, his scale needed to be adjusted to accommodate the intrinsically brighter Population I stars studie ...
... Shapley in his calibration must be about 1.5 magnitudes fainter than the spiral arm Cepheids observed by Leavitt. That is, because Shapley based his scale on intrinsically fainter Population II stars, his scale needed to be adjusted to accommodate the intrinsically brighter Population I stars studie ...
What is the “Meridian”?
... Depending upon your location on Earth, some stars will either never set (i.e., they are always above the horizon) and some stars will never rise (they are always below the horizon). These stars are called “Circumpolar Stars” ...
... Depending upon your location on Earth, some stars will either never set (i.e., they are always above the horizon) and some stars will never rise (they are always below the horizon). These stars are called “Circumpolar Stars” ...
The Dynamics of the Galaxies in the Local Group
... One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
... One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
Astronomy - Bemidji State University
... theory states that the Earth was at the center of the universe and all other heavenly bodies circled it, a model which held for 1400 years until the time of Copernicus. Ptolemy is also famous for his work in geography. He was the first person to use longitude and latitude lines to identify places on ...
... theory states that the Earth was at the center of the universe and all other heavenly bodies circled it, a model which held for 1400 years until the time of Copernicus. Ptolemy is also famous for his work in geography. He was the first person to use longitude and latitude lines to identify places on ...
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.