What is a Star?
... a. absolute magnitude: actual brightness of a star (like absolute values in math) b. apparent magnitude: how bright a star appears based on its energy output, distance from you, & comparison to other stars ...
... a. absolute magnitude: actual brightness of a star (like absolute values in math) b. apparent magnitude: how bright a star appears based on its energy output, distance from you, & comparison to other stars ...
Chapter 13 (Properties of Stars)
... 24. The largest known stars. 25. Most low mass, red stars in our neighborhood. 26. Sirius B, the hot white dwarf only 1/1000th as luminous as the sun. 27. The vast majority of bright blue naked eye stars. 28. Most naked eye stars that appear red or orange in color. 29. The most massive young stars. ...
... 24. The largest known stars. 25. Most low mass, red stars in our neighborhood. 26. Sirius B, the hot white dwarf only 1/1000th as luminous as the sun. 27. The vast majority of bright blue naked eye stars. 28. Most naked eye stars that appear red or orange in color. 29. The most massive young stars. ...
US - Real Science
... Observations with ESO's 3.6-meter telescope at La Silla ____ shown that its 'real' center, around which it rotates, ____ not coincide with the central bar. So its rotation __ out of kilter. But strangely enough NGC 1313 is __ isolated galaxy. It is not part of a group ___ has no near neighbors. It i ...
... Observations with ESO's 3.6-meter telescope at La Silla ____ shown that its 'real' center, around which it rotates, ____ not coincide with the central bar. So its rotation __ out of kilter. But strangely enough NGC 1313 is __ isolated galaxy. It is not part of a group ___ has no near neighbors. It i ...
Starburst Galaxies Under the Microscope: High
... The importance of spatial resolution The study of starburst galaxies through infrared techniques has benefited significantly from observations with the Infrared Space Observatory (ISO) and the Spitzer Space Telescope. Yet, while these space-based observations have provided unmatched sensitivity and ...
... The importance of spatial resolution The study of starburst galaxies through infrared techniques has benefited significantly from observations with the Infrared Space Observatory (ISO) and the Spitzer Space Telescope. Yet, while these space-based observations have provided unmatched sensitivity and ...
Stellar Continua
... • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K (but depends on metallicity) • For hotter stars, neutral H and H- opacities diminish, continu ...
... • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K (but depends on metallicity) • For hotter stars, neutral H and H- opacities diminish, continu ...
FRAC TRIVIA I QUIZ - Flint River Astronomy Club
... 6. (8 pts.). Name eight Messier objects that are bright enough to be seen without binoculars or a telescope from a dark site in, say, Arizona. 7. (6 pts.). Three Messier objects are referred to as “Pinwheel Galaxy.” What are they, and what constellations are they in? 8. (5 pts.). Name the five types ...
... 6. (8 pts.). Name eight Messier objects that are bright enough to be seen without binoculars or a telescope from a dark site in, say, Arizona. 7. (6 pts.). Three Messier objects are referred to as “Pinwheel Galaxy.” What are they, and what constellations are they in? 8. (5 pts.). Name the five types ...
Star Types - University of Massachusetts Amherst
... Parallax would be easier to measure if 1) the stars were further away. 2) Earth's orbit were larger. 3) Earth moved backwards along its orbit. 4) none of these. ...
... Parallax would be easier to measure if 1) the stars were further away. 2) Earth's orbit were larger. 3) Earth moved backwards along its orbit. 4) none of these. ...
main sequence
... After shedding its outer layers to form a planetary nebula, it will leave behind this core, which forms the remnant white dwarf. ...
... After shedding its outer layers to form a planetary nebula, it will leave behind this core, which forms the remnant white dwarf. ...
Name - crespiphysics
... 1. What fraction of the sun’s energy that is intercepted by the earth does the earth actually absorb? As a result, what is the earth’s average temperature in degrees Fahrenheit (yes, I’m making you perform a conversion!)? What would the earth’s average temperature be (again in degrees Fahrenheit) if ...
... 1. What fraction of the sun’s energy that is intercepted by the earth does the earth actually absorb? As a result, what is the earth’s average temperature in degrees Fahrenheit (yes, I’m making you perform a conversion!)? What would the earth’s average temperature be (again in degrees Fahrenheit) if ...
Star Formation
... • This requires dust, which blocks all wavelengths, not just those few causing absorption, as a gas does. • But that means you need a MASSIVE interstellar cloud which requires a lot of mass, since dust is only a few percent at most of any interstellar cloud • Star clusters forming in today’s environ ...
... • This requires dust, which blocks all wavelengths, not just those few causing absorption, as a gas does. • But that means you need a MASSIVE interstellar cloud which requires a lot of mass, since dust is only a few percent at most of any interstellar cloud • Star clusters forming in today’s environ ...
Star Formation
... Stars of Other Masses Some fragments are too small for fusion ever to begin They gradually cool off and become dark “clinkers” A protostar must have 0.08 the mass of the Sun (which is 80 times the mass of Jupiter) in order to become dense and hot enough that fusion can begin If the mass of the “fai ...
... Stars of Other Masses Some fragments are too small for fusion ever to begin They gradually cool off and become dark “clinkers” A protostar must have 0.08 the mass of the Sun (which is 80 times the mass of Jupiter) in order to become dense and hot enough that fusion can begin If the mass of the “fai ...
Wide field telescope using spherical mirrors
... a telescope with 36-m primary mirror and 15-m secondary mirror. The 3° field of view extends over a 7 meter focal surface. The spherical aberration from this system is large (about 2 arc minutes), but many small fields are fully corrected locally using pairs of off-axis mirrors, each are 120 mm diam ...
... a telescope with 36-m primary mirror and 15-m secondary mirror. The 3° field of view extends over a 7 meter focal surface. The spherical aberration from this system is large (about 2 arc minutes), but many small fields are fully corrected locally using pairs of off-axis mirrors, each are 120 mm diam ...
Document
... • They are losing mass rapidly by means of a very strong stellar wind, with speeds up to 2000 km/s. While our own Sun loses approximately 10−14 solar masses every year, Wolf–Rayet stars typically lose 10−5 solar masses a year.[1] • Wolf–Rayet stars are extremely hot, with surface temperatures in th ...
... • They are losing mass rapidly by means of a very strong stellar wind, with speeds up to 2000 km/s. While our own Sun loses approximately 10−14 solar masses every year, Wolf–Rayet stars typically lose 10−5 solar masses a year.[1] • Wolf–Rayet stars are extremely hot, with surface temperatures in th ...
Gravitational Waves – detectors, sources & science
... • “Ripples in spacetime” – any rapidly moving mass generates fluctuations in spacetime curvature. • These fluctuations propagate at the speed of light away from the source. These are gravitational waves! • When a gravitational wave passes through, space is stretched and squeezed alternately. The eff ...
... • “Ripples in spacetime” – any rapidly moving mass generates fluctuations in spacetime curvature. • These fluctuations propagate at the speed of light away from the source. These are gravitational waves! • When a gravitational wave passes through, space is stretched and squeezed alternately. The eff ...
1 Introduction - Arecibo Observatory
... • The system housed in the Gregorian dome provides continuous frequency coverage from 300 MHz to 10 GHz using a pair of shaped (secondary and tertiary) subreflectors, plus standard point feeds and receivers. The dome also provides weather protection. The feeds and receivers themselves are mounted on ...
... • The system housed in the Gregorian dome provides continuous frequency coverage from 300 MHz to 10 GHz using a pair of shaped (secondary and tertiary) subreflectors, plus standard point feeds and receivers. The dome also provides weather protection. The feeds and receivers themselves are mounted on ...
- saspcsus
... planets. The number of stars that can be seen through telescopes is dramatically greater than the number that can be seen by the unaided eye. D. Students know that Earth is one of several planets that orbit the Sun and that the Moon orbits Earth. E. Students know the position of the Sun in the sky c ...
... planets. The number of stars that can be seen through telescopes is dramatically greater than the number that can be seen by the unaided eye. D. Students know that Earth is one of several planets that orbit the Sun and that the Moon orbits Earth. E. Students know the position of the Sun in the sky c ...
main characteristics of the emission from elliptical galaxies
... In the following chapters we will analise the two main portions of the electromagnetic spectrum in which elliptical galaxies show a signi cant behaviour: rst of all we will take a look on the visual band; then we will move to the high energy section, since ellipticals are strong X-rays sources. ...
... In the following chapters we will analise the two main portions of the electromagnetic spectrum in which elliptical galaxies show a signi cant behaviour: rst of all we will take a look on the visual band; then we will move to the high energy section, since ellipticals are strong X-rays sources. ...
Physics: Principle and Applications, 7e (Giancoli) Chapter 33
... B) red giant stars. C) regular stars like our sun. D) white dwarfs. Answer: A Var: 1 7) Black holes A) are gaps in space, containing no matter. B) are predicted by Einstein's special theory of relativity. C) are the collapsed remnant of giant stars. D) cannot be detected in binary star systems. E) a ...
... B) red giant stars. C) regular stars like our sun. D) white dwarfs. Answer: A Var: 1 7) Black holes A) are gaps in space, containing no matter. B) are predicted by Einstein's special theory of relativity. C) are the collapsed remnant of giant stars. D) cannot be detected in binary star systems. E) a ...
Document
... • Bright (V ~ 21 at 110 kpc) • Variable stars (P ~ 0.6 day) with distinct light curves ( ~1 mag amplitude) → easily identifiable ...
... • Bright (V ~ 21 at 110 kpc) • Variable stars (P ~ 0.6 day) with distinct light curves ( ~1 mag amplitude) → easily identifiable ...
International Ultraviolet Explorer
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.