PowerPoint
... b) it arises from cool helium gas present throughout space. c) it can be detected with optical telescopes. d) it is produced by protostars. e) it reveals the structure of new stars. ...
... b) it arises from cool helium gas present throughout space. c) it can be detected with optical telescopes. d) it is produced by protostars. e) it reveals the structure of new stars. ...
NASA`s Kepler Space Telescope Discovers Five Exoplanets
... year and require three transits for verification, it is expected to take at least three years to locate and verify an Earth-size planet. ...
... year and require three transits for verification, it is expected to take at least three years to locate and verify an Earth-size planet. ...
February 2013 - astronomy for beginners
... many cases their different distances from us just makes some look brighter than others. Stars that are closer to us will obviously look brighter than stars that are much further away. So we can then say a star’s apparent brightness is dependent on the actual brightness of that star and its distance ...
... many cases their different distances from us just makes some look brighter than others. Stars that are closer to us will obviously look brighter than stars that are much further away. So we can then say a star’s apparent brightness is dependent on the actual brightness of that star and its distance ...
Ch 11a (Measuring Stars 10-28-10)
... inverse square of the distance (brightness proportional to 1/d2). If we know the apparent brightness and the distance to a star we can calculate its absolute (intrinsic) brightness: apparent brightness = (absolute brightness)/d2 Luminosity (energy/sec) is equivalent to absolute brightness L= 4R2 ...
... inverse square of the distance (brightness proportional to 1/d2). If we know the apparent brightness and the distance to a star we can calculate its absolute (intrinsic) brightness: apparent brightness = (absolute brightness)/d2 Luminosity (energy/sec) is equivalent to absolute brightness L= 4R2 ...
The formation of the galaxy is believed to be similar
... collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars enriched the material now in the disk stars. b) spheroid star ...
... collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars enriched the material now in the disk stars. b) spheroid star ...
Presentation - Relativity Group
... millions to billions of years? • By taking observations of many stars, we can study stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are clas ...
... millions to billions of years? • By taking observations of many stars, we can study stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are clas ...
Powerpoint
... Stars form out of molecular gas (dust) clouds. Star formation happens when part of a dust cloud begins to contract under its own gravitational force (remember, stars are ~1020 x denser than a molecular cloud). As it collapses, the center becomes hotter and hotter until nuclear fusion begins in the c ...
... Stars form out of molecular gas (dust) clouds. Star formation happens when part of a dust cloud begins to contract under its own gravitational force (remember, stars are ~1020 x denser than a molecular cloud). As it collapses, the center becomes hotter and hotter until nuclear fusion begins in the c ...
Plotting Supernova Light Curves
... In this activity, you will obtain a supernova light curve using downloaded data of the galaxy M100, taken with the Faulkes Telescopes. The software package, SalsaJ will be used to carry out photometry on the supernova in the galaxy and standard star (a star which has already had its magnitude accura ...
... In this activity, you will obtain a supernova light curve using downloaded data of the galaxy M100, taken with the Faulkes Telescopes. The software package, SalsaJ will be used to carry out photometry on the supernova in the galaxy and standard star (a star which has already had its magnitude accura ...
H-R Diagram
... After the supernova blast blows off the outer layers of the star, all that is left is the central core. The core now contains a mass between 1.4 and 3.0 times the sun's mass but condensed into a volume 10- to 20km across - roughly the size of a small town on Earth. The matter in a neutron star would ...
... After the supernova blast blows off the outer layers of the star, all that is left is the central core. The core now contains a mass between 1.4 and 3.0 times the sun's mass but condensed into a volume 10- to 20km across - roughly the size of a small town on Earth. The matter in a neutron star would ...
Unit 1
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
Astronomy - Scioly.org
... 51. What event marks the end of every star's main sequence life? a. The end of hydrogen fusion in the core. b. The beginning of the CNO cycle. c. The beginning of the triple-alpha process. d. The formation of a planetary nebula. e. Both a and c above 52. Why can't the lowest-mass stars become giant ...
... 51. What event marks the end of every star's main sequence life? a. The end of hydrogen fusion in the core. b. The beginning of the CNO cycle. c. The beginning of the triple-alpha process. d. The formation of a planetary nebula. e. Both a and c above 52. Why can't the lowest-mass stars become giant ...
Jura et al. 2004 - Department of Physics and Astronomy
... 0.06 M⊕ . The summed mass of the KBOs in the Solar System is uncertain and is currently estimated to be between 0.02 M⊕ and 0.1 M⊕ (Bernstein et al. 2003; Luu & Jewitt 2002). Typical analogs of the Kuiper Belt may have total masses ≤ 0.1 M⊕ (Jura 2004). Since we observed stars with notable infrared ...
... 0.06 M⊕ . The summed mass of the KBOs in the Solar System is uncertain and is currently estimated to be between 0.02 M⊕ and 0.1 M⊕ (Bernstein et al. 2003; Luu & Jewitt 2002). Typical analogs of the Kuiper Belt may have total masses ≤ 0.1 M⊕ (Jura 2004). Since we observed stars with notable infrared ...
theh – rdiagramsofyoungclust ersandtheformati on ofp
... the interstellar medium, one can estimate the absorption in the early solar nebula. Let us assume its radius was comparable to the present radius of pluto's orbit, and its mass ten times the present mass of the planetary system, hence the density of the solar nebula at that stage was 2.5 X 10-14 gm/ ...
... the interstellar medium, one can estimate the absorption in the early solar nebula. Let us assume its radius was comparable to the present radius of pluto's orbit, and its mass ten times the present mass of the planetary system, hence the density of the solar nebula at that stage was 2.5 X 10-14 gm/ ...
Red Dwarf Stars: Ages, Rotation, Magnetic
... tionary age. Two recent independent age determinations for the 40 Eri B are essentially identical, yielding an age of 5.1±0.7 Gyr (Ballouz et al. 2010; Zhao et al. 2011). We used this WD age to calibrate the measured Ca ii HK and coronal X-ray luminosity (LX ) of the K1 V and M4.5 V stars. We have b ...
... tionary age. Two recent independent age determinations for the 40 Eri B are essentially identical, yielding an age of 5.1±0.7 Gyr (Ballouz et al. 2010; Zhao et al. 2011). We used this WD age to calibrate the measured Ca ii HK and coronal X-ray luminosity (LX ) of the K1 V and M4.5 V stars. We have b ...
Lecture19
... earth, heading straight to towards the core. It would surface again on the opposite side of the planet, and fall again. Again and again it would fall until it settled at the center of the earth. ...
... earth, heading straight to towards the core. It would surface again on the opposite side of the planet, and fall again. Again and again it would fall until it settled at the center of the earth. ...
The First Stars in the Universe
... the clumps have built up to at least a few hundred solar masses. Did the first collapsing clumps form stars with similarly large masses, or did they fragment and form many smaller stars? The research groups have pushed their calculations to the point at which the clumps are well on their way to form ...
... the clumps have built up to at least a few hundred solar masses. Did the first collapsing clumps form stars with similarly large masses, or did they fragment and form many smaller stars? The research groups have pushed their calculations to the point at which the clumps are well on their way to form ...
00 T Tauri Stars Have Extensive Coronae?
... Later, more characteristics have been found for T Tauri stars, e.g. IR excess, "veiling", complex emission li ne profiles and a lot more. The strength of the emission lines varies strongly from star to star. In the following we wantto discuss some emissionline properties and the place of their origi ...
... Later, more characteristics have been found for T Tauri stars, e.g. IR excess, "veiling", complex emission li ne profiles and a lot more. The strength of the emission lines varies strongly from star to star. In the following we wantto discuss some emissionline properties and the place of their origi ...
Astronomy Through the Ages: 2 Middle ages through Renaissance
... Copernicus wrote an overview of his model and circulated it among his friends, including high officials of the church in 1514 CE. – It was well received, many including Pope Paul III were eager to learn more about his theory. – But he resisted openly publishing his views over two decades, not wishin ...
... Copernicus wrote an overview of his model and circulated it among his friends, including high officials of the church in 1514 CE. – It was well received, many including Pope Paul III were eager to learn more about his theory. – But he resisted openly publishing his views over two decades, not wishin ...
Sirius Astronomer - Orange County Astronomers
... inter-relationships of Earth’s carbon, water, energy, and trace gases as they are exchanged between the terrestrial biosphere and the atmosphere. Ultimately, they hope to understand Earth as an integrated system, and model changes in climate over the next 50-100 years. The better the models, the mor ...
... inter-relationships of Earth’s carbon, water, energy, and trace gases as they are exchanged between the terrestrial biosphere and the atmosphere. Ultimately, they hope to understand Earth as an integrated system, and model changes in climate over the next 50-100 years. The better the models, the mor ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.