Geology/Physics 360
... • The sun reaches 23.5 degrees N of the celestial equator on June 21 (the solstice) • When does it reach 23.5 degrees S of the celestial equator? • When does it reach the celestial equator? (the equinox) ...
... • The sun reaches 23.5 degrees N of the celestial equator on June 21 (the solstice) • When does it reach 23.5 degrees S of the celestial equator? • When does it reach the celestial equator? (the equinox) ...
SMMP_BISANA - Infinity and Beyond
... The brightness of a star depends on both its size and its temperature. How bright a star looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent br ...
... The brightness of a star depends on both its size and its temperature. How bright a star looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent br ...
solutions
... 10 seconds actually, or 0.1 s using the result of part ’C’). A 7 × 104 g person (with the same density as water) is 4 × 104 times smaller than the tank, so finally: during the supernova, there were about 1013 (or 1011 for a 10s dispersion) neutrinos passing through your body per second. 1Because the ...
... 10 seconds actually, or 0.1 s using the result of part ’C’). A 7 × 104 g person (with the same density as water) is 4 × 104 times smaller than the tank, so finally: during the supernova, there were about 1013 (or 1011 for a 10s dispersion) neutrinos passing through your body per second. 1Because the ...
Document
... • Interstellar gas clouds emit intense microwaves at specific frequencies. • Doppler shift gives speed • True speed plus proper motion gives distance • Maybe 10s of Mpc but new technique ...
... • Interstellar gas clouds emit intense microwaves at specific frequencies. • Doppler shift gives speed • True speed plus proper motion gives distance • Maybe 10s of Mpc but new technique ...
The Sun and the Stars
... Spectral Classification – Harvard Classification scheme Work originally started by Henry Draper, continued by Annie Jump Cannon in 1910s, results published in the Henry Draper Catalogue. Extended version of HD catalogue contains spectra of 225,000 stars down to 9th magnitude. Annie Jump Cannon – spe ...
... Spectral Classification – Harvard Classification scheme Work originally started by Henry Draper, continued by Annie Jump Cannon in 1910s, results published in the Henry Draper Catalogue. Extended version of HD catalogue contains spectra of 225,000 stars down to 9th magnitude. Annie Jump Cannon – spe ...
Stars and Constellations
... Orion. Ursa Minor. Scorpius. Do you recognize these names? They are the names of major constellations in the night sky. A constellation is a group of stars which form a pattern when seen from Earth. The stars are divided into 88 constellations, ranging from the large Centaurus constellation (which i ...
... Orion. Ursa Minor. Scorpius. Do you recognize these names? They are the names of major constellations in the night sky. A constellation is a group of stars which form a pattern when seen from Earth. The stars are divided into 88 constellations, ranging from the large Centaurus constellation (which i ...
Avoiding Run-On Sentences: Practice Exercise I 1. Our solar system
... 6. The Milky Way looks like a dim cloud stretching across the night sky it is actually a huge galaxy containing millions of stars. The Milky Way looks like a dim cloud stretching across the night sky, it is actually a huge galaxy containing millions of stars. The cloud-like Milky Way stretching acr ...
... 6. The Milky Way looks like a dim cloud stretching across the night sky it is actually a huge galaxy containing millions of stars. The Milky Way looks like a dim cloud stretching across the night sky, it is actually a huge galaxy containing millions of stars. The cloud-like Milky Way stretching acr ...
30.2 PowerPoint Stellar Evolution
... blue super-giant with its ring and bipolar outflow marks the end of the life cycle. ...
... blue super-giant with its ring and bipolar outflow marks the end of the life cycle. ...
Chapter 13: Interstellar Matter and Star Formation
... century. Russell thought that stars are born as red giants, become O- and B-type main sequence stars and then move down the main sequence, gradually dimming as they live out their lives. 2. We now know that stars live most of their on the main sequence with very little change in position and the red ...
... century. Russell thought that stars are born as red giants, become O- and B-type main sequence stars and then move down the main sequence, gradually dimming as they live out their lives. 2. We now know that stars live most of their on the main sequence with very little change in position and the red ...
Activity 10: Lifecycle Of A Star
... Watch the Lifecycle of a Star movie at BrainPOP - http://www.brainpop.com/ - to complete this page. (Needs to subscribe) 1. Stars change during their lifetime, which can be _______________ of years long. They ...
... Watch the Lifecycle of a Star movie at BrainPOP - http://www.brainpop.com/ - to complete this page. (Needs to subscribe) 1. Stars change during their lifetime, which can be _______________ of years long. They ...
AAS Poster, NM 2002: "The Discovery of New
... Photometry of the galaxy was done using the IRAF/daophot package and our own scripts and code. In order to preserve the photometric integrity of the individual chips within a Mosaic frame, chips were analyzed separately. In the case of IC10, the galaxy was confined to a single chip. An additional ch ...
... Photometry of the galaxy was done using the IRAF/daophot package and our own scripts and code. In order to preserve the photometric integrity of the individual chips within a Mosaic frame, chips were analyzed separately. In the case of IC10, the galaxy was confined to a single chip. An additional ch ...
Bright stars and faint stars: the stellar magnitude system Magnitudes
... Absolute Magnitude: a measure of the intrinsic brilliance of a star • Pick a star (any star) • Imagine moving it to a distance of 10 parsecs • The apparent magnitude it would have is its absolute magnitude • The absolute magnitude is a distanceindependent quantity • Look at Appendix 12 and Appendix ...
... Absolute Magnitude: a measure of the intrinsic brilliance of a star • Pick a star (any star) • Imagine moving it to a distance of 10 parsecs • The apparent magnitude it would have is its absolute magnitude • The absolute magnitude is a distanceindependent quantity • Look at Appendix 12 and Appendix ...
Lecture 9a: More on Star formation and evolution 10/22
... Review… • “Spectral” Parallax – From stars whose distances were measured directly, absolute magnitude could be determined from apparent magnitude – These absolute magnitudes correlated with spectral classes (O B A F G K M)… – Spectral classes are correlated with temperature, that is determined from ...
... Review… • “Spectral” Parallax – From stars whose distances were measured directly, absolute magnitude could be determined from apparent magnitude – These absolute magnitudes correlated with spectral classes (O B A F G K M)… – Spectral classes are correlated with temperature, that is determined from ...
3P15.pdf
... High resolution spectra of 10 UV Cet type flare stars have been analysed in this work. Age, line profiles, rotation and flux-flux relationships have been studied and the results have been compared with the ones obtained by López-Santiago et al (2004a, b) for a sample of 144 stars, with spectral type ...
... High resolution spectra of 10 UV Cet type flare stars have been analysed in this work. Age, line profiles, rotation and flux-flux relationships have been studied and the results have been compared with the ones obtained by López-Santiago et al (2004a, b) for a sample of 144 stars, with spectral type ...
2007_AO - University of Hawaii
... Ground-based AO Complements Space Telescopes Advantages of AO on 8-10 m ground-based telescopes • Four times better spatial resolution in infrared • Better faint-object sensitivity at wavelengths > 2 microns • Outstanding infrared spectroscopy – Higher spectral & spatial resolution ...
... Ground-based AO Complements Space Telescopes Advantages of AO on 8-10 m ground-based telescopes • Four times better spatial resolution in infrared • Better faint-object sensitivity at wavelengths > 2 microns • Outstanding infrared spectroscopy – Higher spectral & spatial resolution ...
PHYS 390 Lecture 31 - Kinematics of galaxies 31
... Galaxies assume a variety of shapes, but certainly one of the more common shapes is a spiral or pinwheel: ...
... Galaxies assume a variety of shapes, but certainly one of the more common shapes is a spiral or pinwheel: ...
OBAFGKM(LT) extra credit due today. Mid
... The core of a brown dwarf is so dense that “electron degeneracy” pressure halts the contraction before H fusion can begin. Quantum mechanics says that electrons cannot be in the same place at the same time. ...
... The core of a brown dwarf is so dense that “electron degeneracy” pressure halts the contraction before H fusion can begin. Quantum mechanics says that electrons cannot be in the same place at the same time. ...
1 Ay 124 Winter 2016 – HOMEWORK #3
... At a projected radius of 1 arcsec, stars in the nucleus have a line of sight velocity dispersion of 150 km s−1 , and are also rotating about the nucleus at 150 km s−1 . The total luminosity from within 1 arc second is 3 × 106 LV . a) Calculate the total mass, and the mass to light ratio, in the inn ...
... At a projected radius of 1 arcsec, stars in the nucleus have a line of sight velocity dispersion of 150 km s−1 , and are also rotating about the nucleus at 150 km s−1 . The total luminosity from within 1 arc second is 3 × 106 LV . a) Calculate the total mass, and the mass to light ratio, in the inn ...
A little bit more to do. Stefan
... for a given element (say, calcium, iron, gold, etc) then we need to know the temperature of the star. If we know the temperature we can account for its effect and… • The line strength will only depend on the Number of Absorbers. ...
... for a given element (say, calcium, iron, gold, etc) then we need to know the temperature of the star. If we know the temperature we can account for its effect and… • The line strength will only depend on the Number of Absorbers. ...
Notes for Unit 5
... -note that a few ancient Greeks had proposed a sun-centered universe, but their arguments didn’t hold up to Ptolemy’s. -in 1543, Nicholas Copernicus’ On the Revolutions of the Heavenly Bodies was published. He proposed a sun-centered universe. Note that although this was a radical change, he used ma ...
... -note that a few ancient Greeks had proposed a sun-centered universe, but their arguments didn’t hold up to Ptolemy’s. -in 1543, Nicholas Copernicus’ On the Revolutions of the Heavenly Bodies was published. He proposed a sun-centered universe. Note that although this was a radical change, he used ma ...
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.