ASTR 1050: Survey of Astronomy
... 25. A main sequence type A star has about twice the surface temperature of our sun (a type G star). Assuming the stars are about the same physical size (i.e., same radius), how much more luminous is the type A star? a. Twice as luminous. b. Four times as luminous. c. Eight times as luminous. d. Sixt ...
... 25. A main sequence type A star has about twice the surface temperature of our sun (a type G star). Assuming the stars are about the same physical size (i.e., same radius), how much more luminous is the type A star? a. Twice as luminous. b. Four times as luminous. c. Eight times as luminous. d. Sixt ...
here in Powerpoint format
... bA is the apparent brightness of star A bB is the apparent brightness of star B mA is the apparent magnitude of star A mB is the apparent magnitude of star B ...
... bA is the apparent brightness of star A bB is the apparent brightness of star B mA is the apparent magnitude of star A mB is the apparent magnitude of star B ...
Life Cycle of a Star
... Neutron stars are typically about ten miles in diameter and spin very rapidly (one revolution takes mere seconds!). Neutron stars are fascinating because they are the densest objects known. Due to its small size and high density, a neutron star possesses a surface gravitational field about 300,000 t ...
... Neutron stars are typically about ten miles in diameter and spin very rapidly (one revolution takes mere seconds!). Neutron stars are fascinating because they are the densest objects known. Due to its small size and high density, a neutron star possesses a surface gravitational field about 300,000 t ...
The Life Cycle of Stars Stars are a fascinating part of our universe
... After a star is born, it enters the main sequence phase of its life. The amount of time a star remains in the main sequence phase depends upon its mass. Smaller stars remain here much longer than larger stars. The main sequence stage is the longest stage in star’s life cycle. Small stars can remain ...
... After a star is born, it enters the main sequence phase of its life. The amount of time a star remains in the main sequence phase depends upon its mass. Smaller stars remain here much longer than larger stars. The main sequence stage is the longest stage in star’s life cycle. Small stars can remain ...
2 - Lnk2Lrn
... for the initial high temperature necessary for fusion. The fusion process releases so much energy that the pressure created prevents the star from collapsing due to gravitational pressure. ...
... for the initial high temperature necessary for fusion. The fusion process releases so much energy that the pressure created prevents the star from collapsing due to gravitational pressure. ...
Star Formation - University of Redlands
... a. it is hot and things that are hot glow red. b. it is ionized hydrogen which appears red because the brightest emission line is red. c. it is cold and things that are cold appear red. d. it is full of red stars. e. dust between the observer and the region blocks the blue light, but lets the red li ...
... a. it is hot and things that are hot glow red. b. it is ionized hydrogen which appears red because the brightest emission line is red. c. it is cold and things that are cold appear red. d. it is full of red stars. e. dust between the observer and the region blocks the blue light, but lets the red li ...
File
... factor of a hundred to a million (corresponding to 5 to 15 magnitudes) in a few days or weeks. ...
... factor of a hundred to a million (corresponding to 5 to 15 magnitudes) in a few days or weeks. ...
TMSP Stellar Evolution & Life
... •The end result is that each element of matter has its own unique spectrum that can be seen as either a bright (emission) or dark (absorption) line, depending on how it is viewed. •And since this can be done (and has been done) in laboratories with elements heated to gaseous states, we now have a c ...
... •The end result is that each element of matter has its own unique spectrum that can be seen as either a bright (emission) or dark (absorption) line, depending on how it is viewed. •And since this can be done (and has been done) in laboratories with elements heated to gaseous states, we now have a c ...
YSO/PMS disk types, time-scales and evolution from 1
... To move allow another perspective independent of the larger fluctuation of age in HR fitting; we also present a model based upon the scheme of Cieza et al (2007) Cieza use l turnoff and α excess – which describe the distance of the inner disk to the central star and the degree of opacity or thicknes ...
... To move allow another perspective independent of the larger fluctuation of age in HR fitting; we also present a model based upon the scheme of Cieza et al (2007) Cieza use l turnoff and α excess – which describe the distance of the inner disk to the central star and the degree of opacity or thicknes ...
The Northern Winter Constellations
... Introduction The winter sky is an excellent place to begin exploring the constellations that make up the night sky. Orion is the key, or signpost, for locating many of the other constellations in the winter sky. There are two convenient ways to locate all of the main constellations around Orion once ...
... Introduction The winter sky is an excellent place to begin exploring the constellations that make up the night sky. Orion is the key, or signpost, for locating many of the other constellations in the winter sky. There are two convenient ways to locate all of the main constellations around Orion once ...
AST301.Ch22.NeutGammBH - University of Texas Astronomy
... because pulsars should slow down and fade in millions of years, while all globular clusters are more than 10 billion years old!) So very old. Interpretation: Neutron star spun up by accretion from binary companion (closely related to x-ray bursters, which may be on their way to becoming millisecond ...
... because pulsars should slow down and fade in millions of years, while all globular clusters are more than 10 billion years old!) So very old. Interpretation: Neutron star spun up by accretion from binary companion (closely related to x-ray bursters, which may be on their way to becoming millisecond ...
Solution Sheet Lab 1
... Purpose. To determine the length of the sidereal day (the “star” day) from an image of the circumpolar region of the sky. The length of the sidereal day is defined as the time interval between two successive transits of the vernal equinox across the meridian. It is time based upon the Earth’s rotati ...
... Purpose. To determine the length of the sidereal day (the “star” day) from an image of the circumpolar region of the sky. The length of the sidereal day is defined as the time interval between two successive transits of the vernal equinox across the meridian. It is time based upon the Earth’s rotati ...
W > 1 - The Open University
... Gamma () Vir. Porrima. ds (3.5/3.5) see separate sheet. Use the guide above for Coma to locate M99. Then move 2o southeast to reach NGC4374 (M84) (9.3) eg and NGC4406 (M86) (9.2) eg easily visible in the same field of view. Scan this field carefully to locate other non-Messier galaxies. Note their ...
... Gamma () Vir. Porrima. ds (3.5/3.5) see separate sheet. Use the guide above for Coma to locate M99. Then move 2o southeast to reach NGC4374 (M84) (9.3) eg and NGC4406 (M86) (9.2) eg easily visible in the same field of view. Scan this field carefully to locate other non-Messier galaxies. Note their ...
Masers and high mass star formation Claire Chandler
... Other differences between low- and high-mass star formation • Physical properties of clouds undergoing low- and highmass star formation are different: – Massive SF: clouds are warmer, larger, more massive, mainly located in spiral arms; high mass stars form in clusters and ...
... Other differences between low- and high-mass star formation • Physical properties of clouds undergoing low- and highmass star formation are different: – Massive SF: clouds are warmer, larger, more massive, mainly located in spiral arms; high mass stars form in clusters and ...
The Evening Sky Map
... Last Quarter Moon at 3:50 UT. Moon near Saturn (morning sky) at 0h UT. Mag. +0.5. Moon near Mercury (26° from Sun, morning sky) at 4h UT. Mag. +0.3. New Moon at 23:47 UT. Start of lunation 1140. ...
... Last Quarter Moon at 3:50 UT. Moon near Saturn (morning sky) at 0h UT. Mag. +0.5. Moon near Mercury (26° from Sun, morning sky) at 4h UT. Mag. +0.3. New Moon at 23:47 UT. Start of lunation 1140. ...
Using Parallax to Measure the Distance of Stars
... One of the most difficult problems in astronomy is determining the distances to objects in the sky. There are four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby ...
... One of the most difficult problems in astronomy is determining the distances to objects in the sky. There are four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby ...
Star Formation
... • Evidence: Mg 26 far above standard levels, within the body of meteorites. Mg 26 is the daughter product of Al 26, a radioactive element created in supernova explosions. • Indicates: A supernova went off nearby, seeding the solar system with Al 26 while the material which makes meteorites was still ...
... • Evidence: Mg 26 far above standard levels, within the body of meteorites. Mg 26 is the daughter product of Al 26, a radioactive element created in supernova explosions. • Indicates: A supernova went off nearby, seeding the solar system with Al 26 while the material which makes meteorites was still ...
astronomy webquest…… explore the universe
... Stars and planets are made from gases in a __________________. The Milky Way Galaxy is approximately _______________ light years across. How much longer will our Sun last? _________________________ Lifetimes of stars range from ___________ to ____________ years. Our star orbits the centre of our gal ...
... Stars and planets are made from gases in a __________________. The Milky Way Galaxy is approximately _______________ light years across. How much longer will our Sun last? _________________________ Lifetimes of stars range from ___________ to ____________ years. Our star orbits the centre of our gal ...
pps - JMMC
... – PRIMA can only give partial information on them (1D measurements <=> 1 baseline) – if PRIMA can reach the appropriate limiting magnitude (UTs needed, also because of confusion) and accuracy in 30 min (time scale of flare) – a better instrument for it would be Gravity courtesy: F. Eisenhauer (MPE) ...
... – PRIMA can only give partial information on them (1D measurements <=> 1 baseline) – if PRIMA can reach the appropriate limiting magnitude (UTs needed, also because of confusion) and accuracy in 30 min (time scale of flare) – a better instrument for it would be Gravity courtesy: F. Eisenhauer (MPE) ...
Intro To Astronomy
... Position of Polaris For an observer located at some latitude and longitude • Polaris stays in same spot throughout the night • We say it has the same Altitude and Azimuth throughout the night • We can refer to all stars and objects with two angles (Altitude, Azimuth) • These are Local Coordinates • ...
... Position of Polaris For an observer located at some latitude and longitude • Polaris stays in same spot throughout the night • We say it has the same Altitude and Azimuth throughout the night • We can refer to all stars and objects with two angles (Altitude, Azimuth) • These are Local Coordinates • ...
In the icy near-vacuum of interstellar space are seething
... am by the delicate symbiosis that exists between the stars and the interstellar medium, how each is nourished by the other and how the galaxy as we know it is entirely a consequence of that balance and interplay." Astronomers have long known that there are huge, cloudlike collections of dust and ga ...
... am by the delicate symbiosis that exists between the stars and the interstellar medium, how each is nourished by the other and how the galaxy as we know it is entirely a consequence of that balance and interplay." Astronomers have long known that there are huge, cloudlike collections of dust and ga ...
Introduction To Astronomy
... Position of Polaris For an observer located at some latitude and longitude • Polaris stays in same spot throughout the night • We say it has the same Altitude and Azimuth throughout the night • We can refer to all stars and objects with two angles (Altitude, Azimuth) • These are Local Coordinates • ...
... Position of Polaris For an observer located at some latitude and longitude • Polaris stays in same spot throughout the night • We say it has the same Altitude and Azimuth throughout the night • We can refer to all stars and objects with two angles (Altitude, Azimuth) • These are Local Coordinates • ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.