“Reach for the Stars” Practice Exam
... Background information: A Type I supernova event may occur within binary system having a white dwarf and a red giant in relatively close proximity. The exceedingly strong gravitational attraction of the white dwarf attracts materials from the outer layers of its red giant companion. When the white d ...
... Background information: A Type I supernova event may occur within binary system having a white dwarf and a red giant in relatively close proximity. The exceedingly strong gravitational attraction of the white dwarf attracts materials from the outer layers of its red giant companion. When the white d ...
proper motion
... will last only 30 million years. A star with 0.25 solar masses can last 320 billion years. ...
... will last only 30 million years. A star with 0.25 solar masses can last 320 billion years. ...
ASTR 1020 General Astronomy: Stars and Galaxies REVIEW
... Huge stars like Rigel are gone in a few million There aren’t many large stars out there, because they don’t last. 10,000 O stars of the 100,000,000,000 Milky Way stars ...
... Huge stars like Rigel are gone in a few million There aren’t many large stars out there, because they don’t last. 10,000 O stars of the 100,000,000,000 Milky Way stars ...
Big Bang PPT
... But we can also observe small fluctuations of temperature which may have lead to the formation of the galaxies. ...
... But we can also observe small fluctuations of temperature which may have lead to the formation of the galaxies. ...
changing constellations
... So, what is going on? The ause each day bec r yea the ing change dur n 2.5 million the Earth moves more tha the Sun (or und aro kilometres as it orbits stars The it). orb full a about 1/365th of dually gra ht nig mid at ds hea above our g a full cycle in change each night, makin one year. kes an ext ...
... So, what is going on? The ause each day bec r yea the ing change dur n 2.5 million the Earth moves more tha the Sun (or und aro kilometres as it orbits stars The it). orb full a about 1/365th of dually gra ht nig mid at ds hea above our g a full cycle in change each night, makin one year. kes an ext ...
DO NOW - PBworks
... The student is expected to explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. ...
... The student is expected to explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe. ...
absolute brightness: The apparent brightness a star would have if it
... black holes: A dense, compact object whose gravitational pull is so strong that - within a certain distance of it - nothing can escape, not even light. Black holes are thought to result from the collapse of certain very massive stars at the ends of their evolution. blazars: a class of active galaxie ...
... black holes: A dense, compact object whose gravitational pull is so strong that - within a certain distance of it - nothing can escape, not even light. Black holes are thought to result from the collapse of certain very massive stars at the ends of their evolution. blazars: a class of active galaxie ...
Stellar Classification - Solar Physics and Space Weather
... • Rigel (in Orion) is a prominent B class blue supergiant • Their spectra have neutral helium and moderate hydrogen lines • As O and B stars are so powerful, they live for a very short time and tend to cluster together in OB1 associations, which are associated with giant molecular clouds • The Orion ...
... • Rigel (in Orion) is a prominent B class blue supergiant • Their spectra have neutral helium and moderate hydrogen lines • As O and B stars are so powerful, they live for a very short time and tend to cluster together in OB1 associations, which are associated with giant molecular clouds • The Orion ...
Origins of the Universe
... called cosmic microwave background (CMB) radiation basically stretched out energy waves (gamma rays that are ...
... called cosmic microwave background (CMB) radiation basically stretched out energy waves (gamma rays that are ...
Doppler Effect • The Doppler Effect is the change in frequency
... Light from a distant galaxy is found to contain the spectral lines of hydrogen. One line has a wavelength measured as 466 nm. When the same line is observed from a hydrogen source on Earth it has a wavelength of 434 nm. a) Calculate the extent of redshift, z, for this galaxy. b) Calculate the speed ...
... Light from a distant galaxy is found to contain the spectral lines of hydrogen. One line has a wavelength measured as 466 nm. When the same line is observed from a hydrogen source on Earth it has a wavelength of 434 nm. a) Calculate the extent of redshift, z, for this galaxy. b) Calculate the speed ...
the rest of the univ..
... million light years away. How many galaxies are there in the visible universe ? Over 2 million have been counted, but there could be about 100 000 million. How big is the visible universe ? About 15 000 million light years. Stars and dust clouds towards the center of the Milky Way. Stars form half t ...
... million light years away. How many galaxies are there in the visible universe ? Over 2 million have been counted, but there could be about 100 000 million. How big is the visible universe ? About 15 000 million light years. Stars and dust clouds towards the center of the Milky Way. Stars form half t ...
PowerPoint
... • The large majority orbit between Mars and Jupiter • Probably formed from the collisional breakup of several small planets which had unstable orbits due to Jupiter’s strong gravity nearby (evidence: distinct asteroid types with different densities and chemical compositions, as would be expected to ...
... • The large majority orbit between Mars and Jupiter • Probably formed from the collisional breakup of several small planets which had unstable orbits due to Jupiter’s strong gravity nearby (evidence: distinct asteroid types with different densities and chemical compositions, as would be expected to ...
LIFE CYCLE OF STARS
... to its gravity. As the pressure and temperature increase, the new star begins nuclear fusion. As the new star equalizes in pressure and gravity, it becomes a star (its next stage of life). Vocabulary: Nebula-A diffuse mass of interstellar dust and gas. Protostar-Very dense regions (or cores) of mole ...
... to its gravity. As the pressure and temperature increase, the new star begins nuclear fusion. As the new star equalizes in pressure and gravity, it becomes a star (its next stage of life). Vocabulary: Nebula-A diffuse mass of interstellar dust and gas. Protostar-Very dense regions (or cores) of mole ...
Chapter15 (with interactive links)
... Even globular cluster stars have a small amount of heavy elements, but much less than disk stars. => There must have been at least one generation of stars that existed prior to globular clusters. ...
... Even globular cluster stars have a small amount of heavy elements, but much less than disk stars. => There must have been at least one generation of stars that existed prior to globular clusters. ...
Ia 超新星的
... outer layers into space at the final stages of evolution. The mass of a remaining WD is always less than the Chandrasekhar limit, 1.4 Msun, above which a hydrostatic equilibrium of degenerate matter is impossible. ...
... outer layers into space at the final stages of evolution. The mass of a remaining WD is always less than the Chandrasekhar limit, 1.4 Msun, above which a hydrostatic equilibrium of degenerate matter is impossible. ...
Lecture 38. The Fermi Paradox, Von Neumann Machines, Galactic
... For a sufficient number of supernova to deliver heavy elements To the galaxy. Indeed, this is borne out by observations of planetary Systems around nearby stars: Given 100 billion stars in the galaxy, 100,000 should evolve civilizations. If the first of these arose 6 Ga then an intelligent civilizat ...
... For a sufficient number of supernova to deliver heavy elements To the galaxy. Indeed, this is borne out by observations of planetary Systems around nearby stars: Given 100 billion stars in the galaxy, 100,000 should evolve civilizations. If the first of these arose 6 Ga then an intelligent civilizat ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.