THE DAWN OF X-RAY ASTRONOMY
... in 1972 that black holes would have masses greater than 3.4 times the mass of the Sun (Rhoades and Ruffini, 1974).27 Thus we could reach conclusions regarding Cyg X–1: the Cyg X–1 x–ray emitter is a compact object of less than 30 km radius due to the rapidity of the pulsations and the fact that the ...
... in 1972 that black holes would have masses greater than 3.4 times the mass of the Sun (Rhoades and Ruffini, 1974).27 Thus we could reach conclusions regarding Cyg X–1: the Cyg X–1 x–ray emitter is a compact object of less than 30 km radius due to the rapidity of the pulsations and the fact that the ...
Lec09_ch11_lifecycleofstars
... • The collapsing gas and dust form a sphere • As the sphere accretes mass, and collapses the temperature raises, stalling the collapse • At this stage the sphere, now a protostar, can ...
... • The collapsing gas and dust form a sphere • As the sphere accretes mass, and collapses the temperature raises, stalling the collapse • At this stage the sphere, now a protostar, can ...
1 Assignment Discovery Online Curriculum Lesson title
... assume that the stars are fixed, and as the Earth moves in orbit they take measurements of the apparent shift in position. Then they calculate the distance based on a trigonometric relationship between the parallax angle and the “baseline” (the radius of Earth's orbit). Considering that the more dis ...
... assume that the stars are fixed, and as the Earth moves in orbit they take measurements of the apparent shift in position. Then they calculate the distance based on a trigonometric relationship between the parallax angle and the “baseline” (the radius of Earth's orbit). Considering that the more dis ...
Astronomical Picture of the Day
... Elliptical galaxies are unlike spiral galaxies and hence unlike our own Milky Way Galaxy. The giant elliptical galaxy named NGC 4881 on the upper left lies at the edge of the giant Coma Cluster of Galaxies. Elliptical galaxies are ellipsoidal in shape, contain no spiral arms, contain little interste ...
... Elliptical galaxies are unlike spiral galaxies and hence unlike our own Milky Way Galaxy. The giant elliptical galaxy named NGC 4881 on the upper left lies at the edge of the giant Coma Cluster of Galaxies. Elliptical galaxies are ellipsoidal in shape, contain no spiral arms, contain little interste ...
the eye of the beholder: designing the owl
... implies a massive amount of data. After adaptive Seeing-limited field of view ...
... implies a massive amount of data. After adaptive Seeing-limited field of view ...
The Age of the Milky Way Inner Halo
... The mass distribution of the six white dwarfs at the bright tip of the Messier 4 cooling sequence, and the four newly formed white dwarfs in the Galactic halo is shown in F ...
... The mass distribution of the six white dwarfs at the bright tip of the Messier 4 cooling sequence, and the four newly formed white dwarfs in the Galactic halo is shown in F ...
Step-by-Step Instructions for Educators
... You can help us provide feedback to our donors by providing information about your program audience and what they learned. A program audience census along with pre and post surveys are included in the attachment. Once your program is complete, please use this forms to summarize your ...
... You can help us provide feedback to our donors by providing information about your program audience and what they learned. A program audience census along with pre and post surveys are included in the attachment. Once your program is complete, please use this forms to summarize your ...
SAMI Automated Plug Plate Configuration
... 2. Field Stacking: Taking into account inter-field exclusion rules, where the separation of two targets in different fields >3 arcmin, multiple fields are stacked to form a single plate. Each field is taken from a different RA range, so that a nights observation of 3 fields can be performed without ...
... 2. Field Stacking: Taking into account inter-field exclusion rules, where the separation of two targets in different fields >3 arcmin, multiple fields are stacked to form a single plate. Each field is taken from a different RA range, so that a nights observation of 3 fields can be performed without ...
Dust in Space - Max-Planck
... thermal emission of dust in the most distant known quasars. The latter are the ultrabright central regions of galaxies in which a black hole heats up ...
... thermal emission of dust in the most distant known quasars. The latter are the ultrabright central regions of galaxies in which a black hole heats up ...
Lecture2 - UCSB Physics
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
What kind of stuff
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
... • Emission lines arise from gas “ionized” by very energetic radiation • Such high energy radiation is NOT produced by cold old stars, implying that very young stars (10 million years old) are present. • They also contain vast amounts of gas and dust ...
Curiosities of the Sky
... prevalent throughout the universe, and the structure of the Milky Way is everywhere suggestive of them. But this is hazardous sport even for the imagination -- to play with suns as if they were but thistle-down in the wind or corks in a mill-race. Another question arises: What is the thickness of th ...
... prevalent throughout the universe, and the structure of the Milky Way is everywhere suggestive of them. But this is hazardous sport even for the imagination -- to play with suns as if they were but thistle-down in the wind or corks in a mill-race. Another question arises: What is the thickness of th ...
Mankind`s Purple Dawn
... A macro-cosmological view of the world in which our cave painting ancestors lived must take into account the mythological record of a dominant Saturn, the very same god that was clearly identified by the ancients with the actual planet Saturn, a planet that now, somewhat incongruously, resides in ex ...
... A macro-cosmological view of the world in which our cave painting ancestors lived must take into account the mythological record of a dominant Saturn, the very same god that was clearly identified by the ancients with the actual planet Saturn, a planet that now, somewhat incongruously, resides in ex ...
American Scientist
... may form in the disk, which then collect dust grains within them to form larger particles. An intriguing possibility is the existence of vortices, essentially giant cyclones or hurricanes forming out of the gas in the disk. Vortices have the ability to trap particles within them, much like dust devi ...
... may form in the disk, which then collect dust grains within them to form larger particles. An intriguing possibility is the existence of vortices, essentially giant cyclones or hurricanes forming out of the gas in the disk. Vortices have the ability to trap particles within them, much like dust devi ...
on the mass distribution of stars in the solar neighbourhood
... seem very acceptable, but, nevertheless, they deserve comments. Namely, as will be seen below, the upper limit is rather a theoretical value since very massive stars, though easily detectable, are very rare indeed, or more precisely, extremely massive stars are extremely rare. This seems to be a wel ...
... seem very acceptable, but, nevertheless, they deserve comments. Namely, as will be seen below, the upper limit is rather a theoretical value since very massive stars, though easily detectable, are very rare indeed, or more precisely, extremely massive stars are extremely rare. This seems to be a wel ...
PPT-Version - EPS 2003, Aachen
... The light weight structure and the low inertia of the structure allows a fast slewing time in such a way that the telescope will be able to perform an early follow-up of a Gamma Ray Burst With the engines at 70% of full power, the telescope was able to move of ...
... The light weight structure and the low inertia of the structure allows a fast slewing time in such a way that the telescope will be able to perform an early follow-up of a Gamma Ray Burst With the engines at 70% of full power, the telescope was able to move of ...
Renaissance Astronomy
... resorting to special rules needed by the Ptolemaic model. Copernicus offered a simpler explanation for retrograde motion that required no use of epicycles. © Sierra College Astronomy Department ...
... resorting to special rules needed by the Ptolemaic model. Copernicus offered a simpler explanation for retrograde motion that required no use of epicycles. © Sierra College Astronomy Department ...
The colours of the Universe, the amateur astronomical spectroscopy.
... analyze and explore composition of substances. I had decided to get distinctive classes of spectrum: continuous emission and lines spectra. My observations were made by a digital camera with prism spectroscope. I made Continuous emission while I was observing a traditional bulb. When I was heating u ...
... analyze and explore composition of substances. I had decided to get distinctive classes of spectrum: continuous emission and lines spectra. My observations were made by a digital camera with prism spectroscope. I made Continuous emission while I was observing a traditional bulb. When I was heating u ...
The Milky Way and other Galaxies
... From outside, our Milky Way might very much look like our cosmic neighbor, the Andromeda Galaxy. ...
... From outside, our Milky Way might very much look like our cosmic neighbor, the Andromeda Galaxy. ...
Chapter 30: Stars
... converted to energy, which powers the Sun. At the Sun’s rate of hydrogen fusing, it is about halfway through its lifetime, with another 5 billion years or so left. Energy from the Sun The quantity of energy that arrives on Earth every day from the Sun is enormous. Above Earth’s atmosphere, 1354 J of ...
... converted to energy, which powers the Sun. At the Sun’s rate of hydrogen fusing, it is about halfway through its lifetime, with another 5 billion years or so left. Energy from the Sun The quantity of energy that arrives on Earth every day from the Sun is enormous. Above Earth’s atmosphere, 1354 J of ...
9 Measuring the properties of stars - Journigan-wiki
... It offers a simple, pictorial summary of stellar properties. Most stars lie on the main sequence with the hotter stars being more luminous. Blue stars are hottest while red stars are the coolest A star’s mass determines its location along the main sequence with more massive stars located at the top. ...
... It offers a simple, pictorial summary of stellar properties. Most stars lie on the main sequence with the hotter stars being more luminous. Blue stars are hottest while red stars are the coolest A star’s mass determines its location along the main sequence with more massive stars located at the top. ...
15-3 Notes: Galaxies
... of sizes and shapes. The largest galaxies contain more than a trillion stars. Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of g ...
... of sizes and shapes. The largest galaxies contain more than a trillion stars. Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of g ...
Propagation of Light Through Atmospheric Turbulence Lecture 5
... Several equivalent meanings for r0 • Define r0 as telescope diameter where optical transfer functions of the telescope and atmosphere are equal • r0 is separation on the telescope primary mirror where phase correlation has fallen by 1/e • (D/r0)2 is approximate number of speckles in short-exposu ...
... Several equivalent meanings for r0 • Define r0 as telescope diameter where optical transfer functions of the telescope and atmosphere are equal • r0 is separation on the telescope primary mirror where phase correlation has fallen by 1/e • (D/r0)2 is approximate number of speckles in short-exposu ...
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.