Joining the Party - Lincoln-Sudbury Regional High School
... • newly-forming stars and • old stars losing mass. In each case it seems that the maser emission comes from extremely dense clouds or disks of material containing the right molecules. These clouds surround sources of excitation (such as bright young stars, shockwave energy from exploding stars, or r ...
... • newly-forming stars and • old stars losing mass. In each case it seems that the maser emission comes from extremely dense clouds or disks of material containing the right molecules. These clouds surround sources of excitation (such as bright young stars, shockwave energy from exploding stars, or r ...
What is a standard candle?
... Cepheid variable stars are located in two different galaxies, A and B. Both stars have the same average apparent brightness. The star in galaxy A has a bright-dim-bright period of 10 days, while the one in galaxy B has a bright-dim-bright period of 30 days. Which of the two galaxies is at a greater ...
... Cepheid variable stars are located in two different galaxies, A and B. Both stars have the same average apparent brightness. The star in galaxy A has a bright-dim-bright period of 10 days, while the one in galaxy B has a bright-dim-bright period of 30 days. Which of the two galaxies is at a greater ...
Three Coordinate Systems
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
Three Coordinate Systems
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
Stars III - Indiana University Astronomy
... has occurred since the creation of the universe, only 2% of the ordinary matter in the universe is now in the form of heavy elements. Most is still hydrogen and helium ...
... has occurred since the creation of the universe, only 2% of the ordinary matter in the universe is now in the form of heavy elements. Most is still hydrogen and helium ...
The resolved stellar populations of M32 Monachesi, Antonela
... of variable stars, called RR Lyrae. These stars show regular light variations which occur because they pulsate radially, i.e. periodic variations in the radius of RR Lyrae stars produce changes in their brightnesses. Due to the fact that these stars pulsate regularly, their light curve (light variat ...
... of variable stars, called RR Lyrae. These stars show regular light variations which occur because they pulsate radially, i.e. periodic variations in the radius of RR Lyrae stars produce changes in their brightnesses. Due to the fact that these stars pulsate regularly, their light curve (light variat ...
Prof. Kenney C lass 8 September 26, 2016
... Evolution of low mass stars like Sun (M~ 0.1-4 Msun) 4. Planetary Nebula/White Dwarf eventually (after more interesting developments that you don’t need to know…) envelope/outer layers of star are ejected into space to form Planetary Nebula and core becomes white dwarf basic idea: outer layers of ...
... Evolution of low mass stars like Sun (M~ 0.1-4 Msun) 4. Planetary Nebula/White Dwarf eventually (after more interesting developments that you don’t need to know…) envelope/outer layers of star are ejected into space to form Planetary Nebula and core becomes white dwarf basic idea: outer layers of ...
Lecture Eight (Powerpoint format) - Flash
... Sirius A/B Sirius B turns out to be an eclipsing binary, so that its radius can also be determined from the eclipse measurements. These observations revealed a highly unusual structure -- a mass about that of the sun, and a radius about that of the Earth. Sirius B became the first-known white ...
... Sirius A/B Sirius B turns out to be an eclipsing binary, so that its radius can also be determined from the eclipse measurements. These observations revealed a highly unusual structure -- a mass about that of the sun, and a radius about that of the Earth. Sirius B became the first-known white ...
Micro_lect20a
... Orionis, one of the brightest stars in the familiar constellation of Orion, the Hunter. 4. The name Betelgeuse is Arabic in origin. As a massive red supergiant, it is nearing the end of its life and will soon become a supernova. In this historic image, a bright hotspot is revealed on the star's surf ...
... Orionis, one of the brightest stars in the familiar constellation of Orion, the Hunter. 4. The name Betelgeuse is Arabic in origin. As a massive red supergiant, it is nearing the end of its life and will soon become a supernova. In this historic image, a bright hotspot is revealed on the star's surf ...
Understanding the H-R Diagram
... amounts of energy, through the process of converting hydrogen atoms into helium atoms (nuclear fusion). Its absolute magnitude is +4.83. The solar mass is 1.99 x 1030 kg". POLARIS "Polaris (alpha UMi) is the current pole star for the Northern Hemisphere; it is 1 degree from the exact Northern celest ...
... amounts of energy, through the process of converting hydrogen atoms into helium atoms (nuclear fusion). Its absolute magnitude is +4.83. The solar mass is 1.99 x 1030 kg". POLARIS "Polaris (alpha UMi) is the current pole star for the Northern Hemisphere; it is 1 degree from the exact Northern celest ...
Chapter 13
... D) search for radio waves from the accretion disk. E) locate a visible star that disappears when the black hole passes in front of it. 36. The largest known black holes A) can be no more than 1.4 solar masses, according to Chandrasekhar. B) can be no bigger than the earth, like white dwarfs. C) lie ...
... D) search for radio waves from the accretion disk. E) locate a visible star that disappears when the black hole passes in front of it. 36. The largest known black holes A) can be no more than 1.4 solar masses, according to Chandrasekhar. B) can be no bigger than the earth, like white dwarfs. C) lie ...
Chapter 12
... together they “touch” . They generate the neutron degeneracy pressure The densities reach 100 trillion g/cm3 (at those densities the whole Earth would fit in a football stadium!!) The collapsing neutron ...
... together they “touch” . They generate the neutron degeneracy pressure The densities reach 100 trillion g/cm3 (at those densities the whole Earth would fit in a football stadium!!) The collapsing neutron ...
Right Ascension
... Stars – masses The difficulty with binaries is that normally, we don't know how the plane of the orbit is orientated. This complicates the determination of masses. For this reason, eclipsing binaries are very useful. These are binary stars where once per orbit, one star passes in front of the other ...
... Stars – masses The difficulty with binaries is that normally, we don't know how the plane of the orbit is orientated. This complicates the determination of masses. For this reason, eclipsing binaries are very useful. These are binary stars where once per orbit, one star passes in front of the other ...
View Professor Thaler`s presentation slides
... Water and, especially, oxygen (in this case ozone) are smoking gun indicators of our kind of life. Oxygen is much too reactive to remain in the atmosphere without plant life to replenish it. This is a very difficult exoplanet measurement, especially with a small, Earthlike planet. However, the princ ...
... Water and, especially, oxygen (in this case ozone) are smoking gun indicators of our kind of life. Oxygen is much too reactive to remain in the atmosphere without plant life to replenish it. This is a very difficult exoplanet measurement, especially with a small, Earthlike planet. However, the princ ...
Article Reference - Archive ouverte UNIGE
... though a semi amplitude between 60 and 70 m s−1 had been expected. This can be explained either by a highly inclined planet (the impact parameter b < 0.1, even when adjusting only the photometry (see Triaud et al. 2011 for details) or by an additional unaccounted-for broadening of the spectral lines ...
... though a semi amplitude between 60 and 70 m s−1 had been expected. This can be explained either by a highly inclined planet (the impact parameter b < 0.1, even when adjusting only the photometry (see Triaud et al. 2011 for details) or by an additional unaccounted-for broadening of the spectral lines ...
PTYS/ASTR 206 – Section 2 - Lunar and Planetary Laboratory
... At 30 arcminutes, You can almost fit the entire Moon into your field of view. You can see large craters, mare, and mountain ranges, but cannot make out any fine detail such as rimae, rille (lava channels), or small craters. At 30 arcminutes, you can easily see Jupiter as a planet (and not just a dot ...
... At 30 arcminutes, You can almost fit the entire Moon into your field of view. You can see large craters, mare, and mountain ranges, but cannot make out any fine detail such as rimae, rille (lava channels), or small craters. At 30 arcminutes, you can easily see Jupiter as a planet (and not just a dot ...
HR Diagram Lab
... 9. Using the key at the bottom of the graph, color code your diagram. 10. Answer the Additional Questions in your notebook. Questions: Group 1 1. What would you tell someone who thinks that all stars are very similar (be sure to discuss temperature and brightness)? 2. How does our sun compare to oth ...
... 9. Using the key at the bottom of the graph, color code your diagram. 10. Answer the Additional Questions in your notebook. Questions: Group 1 1. What would you tell someone who thinks that all stars are very similar (be sure to discuss temperature and brightness)? 2. How does our sun compare to oth ...
91KB - NZQA
... Rigel was once a main sequence star; this is where Rigel spends most of its life. Main sequence stars use hydrogen gas as their fuel. Hydrogen fuses together (by nuclear fusion) to form helium and release energy. Rigel’s time on the main sequence will be relatively short due to its massive initial m ...
... Rigel was once a main sequence star; this is where Rigel spends most of its life. Main sequence stars use hydrogen gas as their fuel. Hydrogen fuses together (by nuclear fusion) to form helium and release energy. Rigel’s time on the main sequence will be relatively short due to its massive initial m ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.