Chapter 18 The Interstellar Medium - University of Texas Astronomy
... centimeters, which is in the radio portion of the electromagnetic spectrum. Actual 21-cm spectra are complex, as the lines are Doppler shifted and broadened (see spectra to the right). This is the most important spectral line for mapping our own galaxy (the Milky Way): It is at radio wavelengths, so ...
... centimeters, which is in the radio portion of the electromagnetic spectrum. Actual 21-cm spectra are complex, as the lines are Doppler shifted and broadened (see spectra to the right). This is the most important spectral line for mapping our own galaxy (the Milky Way): It is at radio wavelengths, so ...
Chapter 25 - Taylor County Schools
... approximately 30 miles per second. Mercury rotates very slowly and its “day” is 59 Earth days. Mercury has a rocky, crust surface with many craters. This gives it the appearance much like our Moon. Many of these craters were formed when space objects crashed into its surface. The Messenger satellite ...
... approximately 30 miles per second. Mercury rotates very slowly and its “day” is 59 Earth days. Mercury has a rocky, crust surface with many craters. This gives it the appearance much like our Moon. Many of these craters were formed when space objects crashed into its surface. The Messenger satellite ...
MS PowerPoint - National Schools` Observatory
... well if you get within 2 light-years of that value. Velocity : The official value is around 90 km/sec, but again, if you get within 20% of that figure, then you are doing very well. Don’t forget, this is only the velocity perpendicular (sideways) to our line of sight. So, by combining simple measure ...
... well if you get within 2 light-years of that value. Velocity : The official value is around 90 km/sec, but again, if you get within 20% of that figure, then you are doing very well. Don’t forget, this is only the velocity perpendicular (sideways) to our line of sight. So, by combining simple measure ...
Activity 6 The Electromagnetic Spectrum and Your Community
... Christiaan Huygens proposed the idea that light travels in the form of tiny waves. It’s known that light with shorter wavelengths is bent (refracted) more than light with longer wavelengths when it passes through a boundary between two different substances.Violet light is refracted the most, because ...
... Christiaan Huygens proposed the idea that light travels in the form of tiny waves. It’s known that light with shorter wavelengths is bent (refracted) more than light with longer wavelengths when it passes through a boundary between two different substances.Violet light is refracted the most, because ...
Giant “Pulsar” Studies with the Compact Array Abstract
... al. (2011, submitted to MNRAS) suggest that the emission is instead ducted through cavities along the field lines to higher emission heights, and then radiated. Further wide-band observations are required to distinguish between these models. Such observations are being carried out using the new Comp ...
... al. (2011, submitted to MNRAS) suggest that the emission is instead ducted through cavities along the field lines to higher emission heights, and then radiated. Further wide-band observations are required to distinguish between these models. Such observations are being carried out using the new Comp ...
Ch 13 Death of Stars(4-5?-13)
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
Luminosity Classes
... They are smaller and dimmer than Cepheids and their luminosities are all nearly the same making them also good for finding stellar distances Irregular Variables have inconsistent periods and are usually very young and very old stars. ...
... They are smaller and dimmer than Cepheids and their luminosities are all nearly the same making them also good for finding stellar distances Irregular Variables have inconsistent periods and are usually very young and very old stars. ...
EVERYTHING YOU EVER WANTED TO KNOW ABOUT GAIA!
... Radio signals are sent to the satellite using large radio dishes which are pointed to the satellite's location in space. The large quantity of information sent from the satellite to the ground is also transmitted by high frequency radio waves. ...
... Radio signals are sent to the satellite using large radio dishes which are pointed to the satellite's location in space. The large quantity of information sent from the satellite to the ground is also transmitted by high frequency radio waves. ...
everything you ever wanted to know about gaia! - Cosmos
... Radio signals are sent to the satellite using large radio dishes which are pointed to the satellite's location in space. The large quantity of information sent from the satellite to the ground is also transmitted by high frequency radio waves. ...
... Radio signals are sent to the satellite using large radio dishes which are pointed to the satellite's location in space. The large quantity of information sent from the satellite to the ground is also transmitted by high frequency radio waves. ...
After School Guide to Ology Astronomy
... Big Ideas in Astronomy Astronomy is not astrology! Astrology — the belief that the stars and planets can affect your personality and your future — is not science. It’s the science of astronomy that seeks to explain what happens in the universe. Gravity is a key force throughout the universe, and rev ...
... Big Ideas in Astronomy Astronomy is not astrology! Astrology — the belief that the stars and planets can affect your personality and your future — is not science. It’s the science of astronomy that seeks to explain what happens in the universe. Gravity is a key force throughout the universe, and rev ...
Ch. 13 Death of Stars(11-16-10)-3
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
... stops the collapse and produces an object so compact that escape velocity is higher than speed of light; hence, not even light can escape. •NOTE: these are the masses of the dead stars NOT the masses they had when they were on the main sequence ...
NEWS RELEASE
... (Los Angeles, CA) – KNOWLEDGES at Mount Wilson Observatory returns for a weekend featuring site-specific art installations and performances at the historic astronomical observatory. Organized by artist Christina Ondrus, KNOWLEDGES at Mount Wilson Observatory takes place Saturday June 3 and Sunday Ju ...
... (Los Angeles, CA) – KNOWLEDGES at Mount Wilson Observatory returns for a weekend featuring site-specific art installations and performances at the historic astronomical observatory. Organized by artist Christina Ondrus, KNOWLEDGES at Mount Wilson Observatory takes place Saturday June 3 and Sunday Ju ...
Small images
... its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most luminous star in our region of galaxy. A blue supergiant star, 17 solar masses. Brightness va ...
... its center. 570 ly away. Variable star. 1000 times as luminous as the sun Rigel - brightest star in Orion by (a bit more than -Orionis = Betelgeuse – a variable) 7th brightest star in the sky. 770 ly. Most luminous star in our region of galaxy. A blue supergiant star, 17 solar masses. Brightness va ...
Science Jeopardy
... separates the visible light spectrum. • QUESTION: What is a spectroscope or a prism? ...
... separates the visible light spectrum. • QUESTION: What is a spectroscope or a prism? ...
Science Jeopardy
... separates the visible light spectrum. • QUESTION: What is a spectroscope or a prism? ...
... separates the visible light spectrum. • QUESTION: What is a spectroscope or a prism? ...
What Comets Are Made
... studied both chunks using NASA’s Infrared Telescope Facility and the Keck II telescope, both on Hawaii’s Mauna Kea. The researchers found that B and C have nearly identical compositions, with the same proportions of substances such as water and carbon dioxide. Those results suggest that comets have ...
... studied both chunks using NASA’s Infrared Telescope Facility and the Keck II telescope, both on Hawaii’s Mauna Kea. The researchers found that B and C have nearly identical compositions, with the same proportions of substances such as water and carbon dioxide. Those results suggest that comets have ...
Goal: To understand how we know distances to
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
Slide 1
... In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured using the Doppler effect; the speed will be ...
... In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured using the Doppler effect; the speed will be ...
17_LectureOutline
... In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured using the Doppler effect; the speed will be ...
... In order to measure stellar masses in a binary star, the period and semimajor axis of the orbit must be measured. Once this is done, Kepler’s third law gives the sum of the masses of the two stars. Then the relative speeds of the two stars can be measured using the Doppler effect; the speed will be ...
Stellar Evolution – Life of a Star
... region where matter and energy disappear from the visible universe. • A Black Hole grows by pulling in the mass (…and the associated gravitational energy…) around it. • Theoretically, a Black Hole can emit particles. A big Black Hole would emit a particle very slowly; whereas, a small Black Hole wou ...
... region where matter and energy disappear from the visible universe. • A Black Hole grows by pulling in the mass (…and the associated gravitational energy…) around it. • Theoretically, a Black Hole can emit particles. A big Black Hole would emit a particle very slowly; whereas, a small Black Hole wou ...
Parallax - mjeffries
... Near objects appear to move more than far objects. Telephone poles whip by faster than distant trees. The effect is due to the change in observation point, and is used by our eyes for depth perception. angle A base angle B ...
... Near objects appear to move more than far objects. Telephone poles whip by faster than distant trees. The effect is due to the change in observation point, and is used by our eyes for depth perception. angle A base angle B ...
Molecular Outflows Driven by Young Brown Dwarfs And VLMs. New
... Tau 6 and FU Tau A with high angular resolution observations with the Plateau de Bure Interferometer (PdBI). These sources were chosen because their associated CO emission showed clear evidence of an outflow and / or their spectral energy distributions (SEDs) showed strong evidence of a massive accr ...
... Tau 6 and FU Tau A with high angular resolution observations with the Plateau de Bure Interferometer (PdBI). These sources were chosen because their associated CO emission showed clear evidence of an outflow and / or their spectral energy distributions (SEDs) showed strong evidence of a massive accr ...
Goal: To understand how we know distances to various
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
... • If you compare the apparent and absolute magnitudes of an object you get its distance. • How to do that? • 1) spectra – tells you what the mass of the star is by its temperature and its spectral type (although does not work so well for giants – works great for main sequences stars, but this separa ...
The Hobby-Eberly Telescope completion project
... HET was an ambitious project from its inception, aspiring to build a very large telescope comparatively inexpensively by deliberately limiting some typical telescope capabilities, such as full steerability, to fund an increased primary mirror size. Perhaps not surprisingly for an innovative design o ...
... HET was an ambitious project from its inception, aspiring to build a very large telescope comparatively inexpensively by deliberately limiting some typical telescope capabilities, such as full steerability, to fund an increased primary mirror size. Perhaps not surprisingly for an innovative design o ...
Active Galactic Nuclei
... Since quasars can be seen 90% of the way across the universe, they allow us to detect gas throughout the universe. We can therefore examine galaxies (and proto-galaxies) that we can’t even see! Any time the light from a quasar goes through a galaxy that has hydrogen gas, there will be absorption at ...
... Since quasars can be seen 90% of the way across the universe, they allow us to detect gas throughout the universe. We can therefore examine galaxies (and proto-galaxies) that we can’t even see! Any time the light from a quasar goes through a galaxy that has hydrogen gas, there will be absorption at ...
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.