Star Birth
... Life Tracks for Different Masses • Models show that Sun required about 30 million years to go from protostar to main sequence • Higher-mass stars form faster • Lower-mass stars form more slowly ...
... Life Tracks for Different Masses • Models show that Sun required about 30 million years to go from protostar to main sequence • Higher-mass stars form faster • Lower-mass stars form more slowly ...
Slide 1
... Crab pulsar is slowing down at a rate that is consistent with an age of about 1000 years (plus light travel time), which is when the supernova was observed. The sharpness of the pulses indicates that they come from a region roughly 100 km across, since otherwise the finite travel time for light to m ...
... Crab pulsar is slowing down at a rate that is consistent with an age of about 1000 years (plus light travel time), which is when the supernova was observed. The sharpness of the pulses indicates that they come from a region roughly 100 km across, since otherwise the finite travel time for light to m ...
Databases Meet Astronomy a db view of astronomy
... Q17: Find binary stars where at least one of them has the colors of a white dwarf. Q18: Find all objects within 30 arcseconds of one another that have very similar colors: that is where the color ratios u-g, g-r, r-I are less than 0.05m. Q19: Find quasars with a broad absorption line in their spectr ...
... Q17: Find binary stars where at least one of them has the colors of a white dwarf. Q18: Find all objects within 30 arcseconds of one another that have very similar colors: that is where the color ratios u-g, g-r, r-I are less than 0.05m. Q19: Find quasars with a broad absorption line in their spectr ...
The Electromagnetic Spectrum
... A telescope that is designed to collect radiation in the ultraviolet part of the spectrum. The Earth's atmosphere is partially opaque to these wavelengths, so ultraviolet telescopes are put on rockets, balloons, or satellites to get high above most or all of the atmosphere. The ultraviolet domain, t ...
... A telescope that is designed to collect radiation in the ultraviolet part of the spectrum. The Earth's atmosphere is partially opaque to these wavelengths, so ultraviolet telescopes are put on rockets, balloons, or satellites to get high above most or all of the atmosphere. The ultraviolet domain, t ...
The Submillimeter Frontier: A Space Science Imperative
... • z ∼ 3−20 – Secondary structure formation. Cloud cooling is enhanced by the inclusion of newly synthesized heavy elements. Galaxies grow by collisions and absorption of smaller fragments, with a rate governed by the statistics of the primordial density fluctuations and their growth. Many are very ...
... • z ∼ 3−20 – Secondary structure formation. Cloud cooling is enhanced by the inclusion of newly synthesized heavy elements. Galaxies grow by collisions and absorption of smaller fragments, with a rate governed by the statistics of the primordial density fluctuations and their growth. Many are very ...
ph507lecnote07
... Also known as Alpha Canis Majoris, Sirius is the fifth closest system to Sol, at 8.6 light-years. Sirius is composed of a main-sequence star and a white dwarf stellar remnant. They form a close binary, Alpha Canis Majoris A and B, that is separated "on average" by only about 20 times the distance fr ...
... Also known as Alpha Canis Majoris, Sirius is the fifth closest system to Sol, at 8.6 light-years. Sirius is composed of a main-sequence star and a white dwarf stellar remnant. They form a close binary, Alpha Canis Majoris A and B, that is separated "on average" by only about 20 times the distance fr ...
Star - Uplift Education
... 2. A hot, low-density / low pressure gas produces an emission-line spectrum – energy only at specific λ. 3. A continuous spectrum source viewed through a cool, low-density gas produces an absorption-line spectrum – missing λ – dark lines. ...
... 2. A hot, low-density / low pressure gas produces an emission-line spectrum – energy only at specific λ. 3. A continuous spectrum source viewed through a cool, low-density gas produces an absorption-line spectrum – missing λ – dark lines. ...
IAU 29th General Assembly
... •FM 2 – Astronomical Heritage: Progressing the UNESCO–IAU Initiative •FM 3 – Scholarly Publication in Astronomy: Evolution or Revolution? •FM 4 – Planetary Nebulae as Probes of Galactic Structure and Evolution •FM 5 – The Legacy of Planck •FM 6 – X-ray Surveys of the Hot and Energetic Cosmos •FM 7 – ...
... •FM 2 – Astronomical Heritage: Progressing the UNESCO–IAU Initiative •FM 3 – Scholarly Publication in Astronomy: Evolution or Revolution? •FM 4 – Planetary Nebulae as Probes of Galactic Structure and Evolution •FM 5 – The Legacy of Planck •FM 6 – X-ray Surveys of the Hot and Energetic Cosmos •FM 7 – ...
X-ray Emission Line Profile Diagnostics of Hot Star Winds
... Although there’s not good reason to think that these young O stars have convection or magnetic dynamos, they may have magnetic fields that remain from the the collapsing interstellar clouds out of which they formed In fact, q1 Ori C itself has recently had a magnetic field detected on it: A large s ...
... Although there’s not good reason to think that these young O stars have convection or magnetic dynamos, they may have magnetic fields that remain from the the collapsing interstellar clouds out of which they formed In fact, q1 Ori C itself has recently had a magnetic field detected on it: A large s ...
Physics- HSC- Module 9.7 Astrophysics
... The wonders of the Universe are revealed through technological advances based on tested principles of physics. Our understanding of the cosmos draws upon models, theories and laws in our endeavour to seek explanations for the myriad of observations made by various instruments at many different wavel ...
... The wonders of the Universe are revealed through technological advances based on tested principles of physics. Our understanding of the cosmos draws upon models, theories and laws in our endeavour to seek explanations for the myriad of observations made by various instruments at many different wavel ...
Interstellar Space Not as Empty as you Might Think
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) ...
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) ...
Interstellar Space Not as Empty as you Might Think
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) All the heavy elements in the Earth were made in stars, then spent time in interst ...
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) All the heavy elements in the Earth were made in stars, then spent time in interst ...
Measuring the mass of galaxies Luminous matter in a
... Measuring the mass of galaxies Luminous matter in a galaxy: • stars (of different masses) • gas (mostly hydrogen) Can detect these directly using optical and radio telescopes - get an estimate of how much mass they contain BUT… also non-luminous matter which we can’t see directly. Example that we kn ...
... Measuring the mass of galaxies Luminous matter in a galaxy: • stars (of different masses) • gas (mostly hydrogen) Can detect these directly using optical and radio telescopes - get an estimate of how much mass they contain BUT… also non-luminous matter which we can’t see directly. Example that we kn ...
Small Wonders: Ursa Minor
... currently the pole star, this hasn't always been the case, nor will it continue. If you take a look at the image to the right, you can see the circle the northern pole scribes on the night sky. The tic marks denote intervals of around 5200 years. Thus 5200 years from now, the pole star will be Alpha ...
... currently the pole star, this hasn't always been the case, nor will it continue. If you take a look at the image to the right, you can see the circle the northern pole scribes on the night sky. The tic marks denote intervals of around 5200 years. Thus 5200 years from now, the pole star will be Alpha ...
Interstellar Space
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) All the heavy elements in the Earth were made in stars, then spent time in interst ...
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) All the heavy elements in the Earth were made in stars, then spent time in interst ...
Double Stars Discovered by IOTA Predicted Occultations July, 2010
... Both components of the double star were occulted as observed in Arizona, USA. As observed in Japan, one component of the double star was occulted by three observers and 9 observers recorded miss observations. The light curve appears to be a BBAA event. A double asteroid was initially considered, but ...
... Both components of the double star were occulted as observed in Arizona, USA. As observed in Japan, one component of the double star was occulted by three observers and 9 observers recorded miss observations. The light curve appears to be a BBAA event. A double asteroid was initially considered, but ...
1 - Uplift North Hills Prep
... therefore number of stars in shell is proportional to R2 intensity of radiation/light from shell reaching Earth is proportional to 1/R2 since according to Newton’s model such shells stretch to infinity / the sky can never be dark/will always be light ...
... therefore number of stars in shell is proportional to R2 intensity of radiation/light from shell reaching Earth is proportional to 1/R2 since according to Newton’s model such shells stretch to infinity / the sky can never be dark/will always be light ...
Eyeing the retina nebula
... of the heavier elements, including carbon, silicon and iron, in the nuclear fires that burn in their core. Planetary nebulae play a key role in recycling these materials throughout the universe. Without them rocky planets like the Earth and carbon-based life forms like us would not exist. The image ...
... of the heavier elements, including carbon, silicon and iron, in the nuclear fires that burn in their core. Planetary nebulae play a key role in recycling these materials throughout the universe. Without them rocky planets like the Earth and carbon-based life forms like us would not exist. The image ...
204 The Thirty Meter Telescope`s Dilemma in China
... but also as the Mecca for stargazers from around the world. Thanks to its high altitude, dry environment and stable airflow, this million-year-old dormant volcano is home to 13 telescopes built by 11 countries over the past five decades. The construction of the 14th started a year ago: once complete ...
... but also as the Mecca for stargazers from around the world. Thanks to its high altitude, dry environment and stable airflow, this million-year-old dormant volcano is home to 13 telescopes built by 11 countries over the past five decades. The construction of the 14th started a year ago: once complete ...
Document
... therefore number of stars in shell is proportional to R2 intensity of radiation/light from shell reaching Earth is proportional to 1/R2 since according to Newton’s model such shells stretch to infinity / the sky can never be dark/willalways be light ...
... therefore number of stars in shell is proportional to R2 intensity of radiation/light from shell reaching Earth is proportional to 1/R2 since according to Newton’s model such shells stretch to infinity / the sky can never be dark/willalways be light ...
Slide 1
... supernova is an exploding star that can become three times as bright as the sun. When a supernova occurs. All the dust particles, gas, and Dupree collect up. Creating a Nebula. These Nebulas can create many stars like our sun. Some stars can be brighter then others. This is an example of a Supernova ...
... supernova is an exploding star that can become three times as bright as the sun. When a supernova occurs. All the dust particles, gas, and Dupree collect up. Creating a Nebula. These Nebulas can create many stars like our sun. Some stars can be brighter then others. This is an example of a Supernova ...
Characteristics of Main Sequence Stars
... nuclear reactions in high mass stars are generally confined to a very small region, much smaller than the size of the convective core. • As the stellar mass increases, so does the size of the convective core (due again to the large increase in ² with temperature). Supermassive stars with M ∼ 100M¯ w ...
... nuclear reactions in high mass stars are generally confined to a very small region, much smaller than the size of the convective core. • As the stellar mass increases, so does the size of the convective core (due again to the large increase in ² with temperature). Supermassive stars with M ∼ 100M¯ w ...
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.