Low mass stars
... Nearby stars: main-sequence appears. Most stars are less luminous and cooler than the Sun (alpha Centauri, nearest to us and a triple system, is similar). Note the hot small stars: the white dwarfs. ...
... Nearby stars: main-sequence appears. Most stars are less luminous and cooler than the Sun (alpha Centauri, nearest to us and a triple system, is similar). Note the hot small stars: the white dwarfs. ...
Orion-pr-2009 - Astrophysics Research Institute
... The key to the success of this project was the combination of data from all three facilities. Inspired by the richness of his images from UKIRT, Chris Davis contacted colleagues in Europe and on the U.S. Mainland. Tom Megeath, an astronomer from the University of Toledo, provided a catalogue of the ...
... The key to the success of this project was the combination of data from all three facilities. Inspired by the richness of his images from UKIRT, Chris Davis contacted colleagues in Europe and on the U.S. Mainland. Tom Megeath, an astronomer from the University of Toledo, provided a catalogue of the ...
Astrowheel activity for Wednesday Feb 16
... In the earlier lab exercises, you learned how to determine the appearance of the sky above any location on the Earth, as long as you have access to a celestial globe and remember the sidereal time formula. While the procedure is not particularly difficult, it is not particularly convenient either si ...
... In the earlier lab exercises, you learned how to determine the appearance of the sky above any location on the Earth, as long as you have access to a celestial globe and remember the sidereal time formula. While the procedure is not particularly difficult, it is not particularly convenient either si ...
HD 140283: A Star in the Solar Neighborhood that Formed Shortly
... We made FGS observations of HD 140283 at 11 epochs between 2003 August and 2011 March, at dates close to the biannual times of maximum parallax factor. The FGS are interferometers that, in addition to providing guiding control during imaging or spectroscopic observations, can measure precise positio ...
... We made FGS observations of HD 140283 at 11 epochs between 2003 August and 2011 March, at dates close to the biannual times of maximum parallax factor. The FGS are interferometers that, in addition to providing guiding control during imaging or spectroscopic observations, can measure precise positio ...
Hertzsprung Rusell Diagram KLT
... Stars that look to us as though they are near each other, may intact be very far away from each other. Distant but very bright stars look similar to close but dim stars. ...
... Stars that look to us as though they are near each other, may intact be very far away from each other. Distant but very bright stars look similar to close but dim stars. ...
A-level Physics A Question paper Unit 5/W - Astrophysics
... (2) star X, which is significantly cooler and larger than the Sun, (3) star Y, which is the same size as the Sun, but significantly cooler, (4) star Z, which is much smaller than the Sun, and has molecular bands as an important feature in its spectrum. (7 marks) ____ ...
... (2) star X, which is significantly cooler and larger than the Sun, (3) star Y, which is the same size as the Sun, but significantly cooler, (4) star Z, which is much smaller than the Sun, and has molecular bands as an important feature in its spectrum. (7 marks) ____ ...
First firm spectral classification of an early-B pre-main
... Infrared surveys have revealed several hundred candidate massive YSOs, based on luminosity arguments (e.g., Urquhart et al. 2011). A (K-band) spectrum has been obtained for only a few of these (Hanson et al. 1997, 2002; Bik et al. 2006), and they show a red continuum, likely due to hot dust, and an ...
... Infrared surveys have revealed several hundred candidate massive YSOs, based on luminosity arguments (e.g., Urquhart et al. 2011). A (K-band) spectrum has been obtained for only a few of these (Hanson et al. 1997, 2002; Bik et al. 2006), and they show a red continuum, likely due to hot dust, and an ...
The Origin of the Solar System and Other Planetary Systems
... Orbits of 60 of the known extrasolar planets; note that some of them are very close to their star. ...
... Orbits of 60 of the known extrasolar planets; note that some of them are very close to their star. ...
Big Bang Theory
... Introduction: Have you ever listened to the siren of an ambulance? As the ambulance passes by, the pitch of its siren gets lower. This occurs because of the Doppler shift. Sound waves are compressed as the ambulance approaches, causing the pitch to be higher. As the ambulance drives away, the sound ...
... Introduction: Have you ever listened to the siren of an ambulance? As the ambulance passes by, the pitch of its siren gets lower. This occurs because of the Doppler shift. Sound waves are compressed as the ambulance approaches, causing the pitch to be higher. As the ambulance drives away, the sound ...
A rocky planet transiting a nearby low-mass star
... replacing only 0.2% of the rock/iron mix with a hydrogen/helium layer would increase the planet’s radius to 1.4 times that of the Earth, substantially larger than the observed value. Detection of GJ 1132b’s mass is currently only at the 3σ level, but continued Doppler monitoring will shrink the 35% ...
... replacing only 0.2% of the rock/iron mix with a hydrogen/helium layer would increase the planet’s radius to 1.4 times that of the Earth, substantially larger than the observed value. Detection of GJ 1132b’s mass is currently only at the 3σ level, but continued Doppler monitoring will shrink the 35% ...
Observational properties of stars
... formulae so that they are only functions of density and temperature. So those boundaries mark locations where the dominant form of the gas transitions from one form to another. In reality you will not have exactly everything being in one form, there will tend to be some material that is in a slightl ...
... formulae so that they are only functions of density and temperature. So those boundaries mark locations where the dominant form of the gas transitions from one form to another. In reality you will not have exactly everything being in one form, there will tend to be some material that is in a slightl ...
PPS
... HR diagram – star formation Star formation Stars form when cool, relatively dense clouds of gas and dust in space shrink in upon themselves as a result of gravitational collapse. This mainly happens in giant molecular clouds, where the density is about 1 billion or 10 billion atoms per cubic metre. ...
... HR diagram – star formation Star formation Stars form when cool, relatively dense clouds of gas and dust in space shrink in upon themselves as a result of gravitational collapse. This mainly happens in giant molecular clouds, where the density is about 1 billion or 10 billion atoms per cubic metre. ...
Chapter 14
... the kinds of objects that remain after a massive star dies. How strange and wonderful that we humans can talk about places in the universe where gravity is so strong it bends space, slows time, and curves light back on itself! To carry on these discussions, astronomers have learned to use the langua ...
... the kinds of objects that remain after a massive star dies. How strange and wonderful that we humans can talk about places in the universe where gravity is so strong it bends space, slows time, and curves light back on itself! To carry on these discussions, astronomers have learned to use the langua ...
pptx
... Luminosity of main sequence stars is determined by mass Main sequence is a mass sequence (bright hot stars are more massive, cool faint stars are less massive) 10 times as massive 10000 times brighter! ...
... Luminosity of main sequence stars is determined by mass Main sequence is a mass sequence (bright hot stars are more massive, cool faint stars are less massive) 10 times as massive 10000 times brighter! ...
Cepheid
... In Shapley’s day, the LMC and SMC were considered as two isolated offshoots of the Milky Way, different from the spiral nebulae. We now realize that they are ‘dwarf’ galaxies in their own right (but not spirals). ...
... In Shapley’s day, the LMC and SMC were considered as two isolated offshoots of the Milky Way, different from the spiral nebulae. We now realize that they are ‘dwarf’ galaxies in their own right (but not spirals). ...
educator guide - Michigan Science Center
... universe. Recent discoveries have shown, however, that there are many more red dwarf stars than expected. This makes our star brighter than about 85% of all stars. This shouldn’t be taken to mean it is close to the brightest stars out there. In fact, the brightest (and most massive) known star, R136 ...
... universe. Recent discoveries have shown, however, that there are many more red dwarf stars than expected. This makes our star brighter than about 85% of all stars. This shouldn’t be taken to mean it is close to the brightest stars out there. In fact, the brightest (and most massive) known star, R136 ...
Science Olympiad Astronomy C Division Event Golden Gate
... b. Where (what letter A – O) is the object in the DSO NGC 2440? c. Where (what letter A – O) is the variable star Mira? d. Where (what letter A – O) is the object in image 28? e. Where (what letter A – O) is the donor for the type of system that is representative of the light curve in image 27? 7. I ...
... b. Where (what letter A – O) is the object in the DSO NGC 2440? c. Where (what letter A – O) is the variable star Mira? d. Where (what letter A – O) is the object in image 28? e. Where (what letter A – O) is the donor for the type of system that is representative of the light curve in image 27? 7. I ...
Stellar Physics - Craigie High School
... The development of what we know about the Earth, Solar System and Universe is a fascinating study in its own right. From earliest times Man has wondered at and speculated over the ‘Nature of the Heavens’. It is hardly surprising that most people (until around 1500 A.D.) thought that the Sun revolved ...
... The development of what we know about the Earth, Solar System and Universe is a fascinating study in its own right. From earliest times Man has wondered at and speculated over the ‘Nature of the Heavens’. It is hardly surprising that most people (until around 1500 A.D.) thought that the Sun revolved ...
Sky Maps Teacher`s Guide - Northern Stars Planetarium
... ahead. He could hear lots of ……GROWLING! When he peeked into the clearing he saw a giant bear. And the bear was growling and drooling. But the bear had not seen Long Sash, instead he was staring across the clearing. When Long Sash followed the bear's gaze he saw a small boy sitting on a log and cryi ...
... ahead. He could hear lots of ……GROWLING! When he peeked into the clearing he saw a giant bear. And the bear was growling and drooling. But the bear had not seen Long Sash, instead he was staring across the clearing. When Long Sash followed the bear's gaze he saw a small boy sitting on a log and cryi ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.