a Supernova!
... But there is 100x as much energy again in the form of rapidly-moving material (kinetic energy)… and 100 times as much again in the form of neutrinos. That is, the energy in the form of neutrinos is 10,000 times as much as the visible light it produces!! ...
... But there is 100x as much energy again in the form of rapidly-moving material (kinetic energy)… and 100 times as much again in the form of neutrinos. That is, the energy in the form of neutrinos is 10,000 times as much as the visible light it produces!! ...
Stars - Red, Blue, Old, New pt.4
... • Lose a lot of mass as they evolve off the main sequence. More mass=more mass loss. • But they still can’t squeeze into that 1.44 solar mass limit to become a white dwarf as they approach the end of their ...
... • Lose a lot of mass as they evolve off the main sequence. More mass=more mass loss. • But they still can’t squeeze into that 1.44 solar mass limit to become a white dwarf as they approach the end of their ...
a2Lec115
... Use mks system: length=meter, mass =kgm, time=sec Astronomical Unit (AU): Distance from the earth to the sun = semi-major axis of the orbit of Earth around Sun 1 AU = d(sun) = 1.5 x 1011 m Parsec (PC): Distance at which 1 AU subtends Angle of 1 second 1 pc (parsec) = 206625 AU = 3.086 x 1016 m = 3.2 ...
... Use mks system: length=meter, mass =kgm, time=sec Astronomical Unit (AU): Distance from the earth to the sun = semi-major axis of the orbit of Earth around Sun 1 AU = d(sun) = 1.5 x 1011 m Parsec (PC): Distance at which 1 AU subtends Angle of 1 second 1 pc (parsec) = 206625 AU = 3.086 x 1016 m = 3.2 ...
Ch. 17 (RGs & WDs)
... Actual space motion of the Alpha Centauri complex (~4.2 ly away): Get radial velocity from Doppler shifts of the star’s spectral lines Get transverse velocity from proper motion times the stellar distance ...
... Actual space motion of the Alpha Centauri complex (~4.2 ly away): Get radial velocity from Doppler shifts of the star’s spectral lines Get transverse velocity from proper motion times the stellar distance ...
Evolution of a Protostar
... The contraction of a cloud fragment slows when thermal pressure builds up because infrared and radio photons can no longer escape. ...
... The contraction of a cloud fragment slows when thermal pressure builds up because infrared and radio photons can no longer escape. ...
Electromagnetic Spectrum
... • Stars take the color of their peak wavelength. For example the Sun’s peak wavelength is in the yellow region of the visible spectrum, therefore the sun appears to be yellow. • Hotter objects peak on the blue side and cooler objects toward the red • Some objects in the sky are even hotter, and they ...
... • Stars take the color of their peak wavelength. For example the Sun’s peak wavelength is in the yellow region of the visible spectrum, therefore the sun appears to be yellow. • Hotter objects peak on the blue side and cooler objects toward the red • Some objects in the sky are even hotter, and they ...
The Heliocentric Model of the Solar System
... It is the actual sky image, more or less what the naked eye would see in a clear night far from city lights. The relative position of the stars, for example the 3 stars on a line at the center of the picture, seems to be ‘fixed’ relative to each other, i.e. they do not change relative positions in t ...
... It is the actual sky image, more or less what the naked eye would see in a clear night far from city lights. The relative position of the stars, for example the 3 stars on a line at the center of the picture, seems to be ‘fixed’ relative to each other, i.e. they do not change relative positions in t ...
30-1 - Fremont Peak Observatory Association
... At this time (May 2013) Polaris is about 40’ (40 arcminutes) from the North Celestial Pole (NCP). In the course of 24 hours Polaris makes a 1° (1 degree) circle around the NCP. It is somewhat difficult to believe, but at the present time, Polaris is more than one Moon width from the NCP. In addition ...
... At this time (May 2013) Polaris is about 40’ (40 arcminutes) from the North Celestial Pole (NCP). In the course of 24 hours Polaris makes a 1° (1 degree) circle around the NCP. It is somewhat difficult to believe, but at the present time, Polaris is more than one Moon width from the NCP. In addition ...
Integrative Studies 410 Our Place in the Universe
... distance ladder out as far as we can see Cepheids – about 50 million ly • In 1920 Hubble used this technique to measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
... distance ladder out as far as we can see Cepheids – about 50 million ly • In 1920 Hubble used this technique to measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
29 Jan: Maps of the Sky
... for 2010: 221,600 miles or 356,600 km, 7 % less than its average distance. This will make the full Moon appear slightly larger than usual. “ ...
... for 2010: 221,600 miles or 356,600 km, 7 % less than its average distance. This will make the full Moon appear slightly larger than usual. “ ...
November 2005 - Otterbein University
... Aldebaran, Algol, etc.) • Since the 17th century we use a scheme that lists stars by constellation – in order of their apparent brightness – labeled alphabetically in Greek alphabet – Alpha Centauri is the brightest star in constellation Centaurus ...
... Aldebaran, Algol, etc.) • Since the 17th century we use a scheme that lists stars by constellation – in order of their apparent brightness – labeled alphabetically in Greek alphabet – Alpha Centauri is the brightest star in constellation Centaurus ...
The Realm of Physics
... many times does your heart beat in your lifetime. • Ie. We live approximately 102 years, each year contains approximately 107 seconds, and our heart beats about 1 time per second. So, your heart beats about 109 times in your lifetime. ...
... many times does your heart beat in your lifetime. • Ie. We live approximately 102 years, each year contains approximately 107 seconds, and our heart beats about 1 time per second. So, your heart beats about 109 times in your lifetime. ...
No Slide Title
... • For these great distances, miles are no longer practical, we use: ‘Light Years’ • the distance it takes light to travel in one year moving at 186,000 miles per second or about 6 million million miles (6 trillion miles) ...
... • For these great distances, miles are no longer practical, we use: ‘Light Years’ • the distance it takes light to travel in one year moving at 186,000 miles per second or about 6 million million miles (6 trillion miles) ...
2.1 Introduction
... For stars at known distances (or for stars all at the same distance within a cluster), we can construct a diagram plotting their luminosity as a function of colour, as in Figure 2.8. This is undoubtedly the most import diagram in stellar astronomy and we shall explore it in detail during the course ...
... For stars at known distances (or for stars all at the same distance within a cluster), we can construct a diagram plotting their luminosity as a function of colour, as in Figure 2.8. This is undoubtedly the most import diagram in stellar astronomy and we shall explore it in detail during the course ...
Stellar and Atomic Spectra
... electrons is not true? A) Electrons orbit the nucleus rather like planets orbiting the Sun. B) Within an atom, an electron can have only particular energies. C) Electrons can jump between energy levels in an atom only if they receive or give up an amount of energy equal to the difference in energy b ...
... electrons is not true? A) Electrons orbit the nucleus rather like planets orbiting the Sun. B) Within an atom, an electron can have only particular energies. C) Electrons can jump between energy levels in an atom only if they receive or give up an amount of energy equal to the difference in energy b ...
Document
... When astronomers look through their telescopes, they see billions of stars. What can they learn fromThe goal of this problem set is for you to understand that astronomers classify stars on the basis of two different criteria: (1) the intensity of one of the H absorption lines (called H), and (2) on ...
... When astronomers look through their telescopes, they see billions of stars. What can they learn fromThe goal of this problem set is for you to understand that astronomers classify stars on the basis of two different criteria: (1) the intensity of one of the H absorption lines (called H), and (2) on ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.