15 Stellar Structure
... The Source of Stellar Energy Recall from our discussion of the Sun: Stars produce energy by nuclear fusion of hydrogen into helium. ...
... The Source of Stellar Energy Recall from our discussion of the Sun: Stars produce energy by nuclear fusion of hydrogen into helium. ...
Star Wars
... e) If light sabers emit light the same ways stars do("blackbody radiation"), then whose saber has a higher temperature, Darth Vader's or Obi Wan's? ...
... e) If light sabers emit light the same ways stars do("blackbody radiation"), then whose saber has a higher temperature, Darth Vader's or Obi Wan's? ...
Lecture 1: Nucleosynthesis, solar composition, chondrites, volatility
... beyond 4He and 1H burning takes place by C-N-O cycle: four protons fuse using carbon, nitrogen and oxygen isotopes as a catalyst to produce one alpha particle (4He), two positrons and two electron neutrinos. Fusion processes (He burning, C burning, O burning, Si burning can form elements up to mass ...
... beyond 4He and 1H burning takes place by C-N-O cycle: four protons fuse using carbon, nitrogen and oxygen isotopes as a catalyst to produce one alpha particle (4He), two positrons and two electron neutrinos. Fusion processes (He burning, C burning, O burning, Si burning can form elements up to mass ...
this article as a PDF
... Visible towards the southern horizon from winter through spring in the northern hemisphere, Orion is one of the most easily recognizable and beloved constellations. By far, the most popular celestial gem in the constellation of Orion is M42, The Great Orion Nebula. Although it is 1500 light-years aw ...
... Visible towards the southern horizon from winter through spring in the northern hemisphere, Orion is one of the most easily recognizable and beloved constellations. By far, the most popular celestial gem in the constellation of Orion is M42, The Great Orion Nebula. Although it is 1500 light-years aw ...
The Milky Way – A Classic Galaxy
... telescope in the 1920’s to image The Andromeda Nebula • Could see the brightest individual stars. Among them, variables of the right color and light variation to show them as Cepheids • Therefore, this was not a nearby nebula around a new star, it was an entire galaxy. • Herschel’s map then could be ...
... telescope in the 1920’s to image The Andromeda Nebula • Could see the brightest individual stars. Among them, variables of the right color and light variation to show them as Cepheids • Therefore, this was not a nearby nebula around a new star, it was an entire galaxy. • Herschel’s map then could be ...
AP Physics - Universal Gravitation
... the projectile is to rise to a height of 2R above the surface of the planet? Disregard any dissipative effects of the atmosphere. A) B) C) D) E) 6. What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 × 106 m around the Earth? (Mass of Earth = 6.0 × 1024 kg.) ...
... the projectile is to rise to a height of 2R above the surface of the planet? Disregard any dissipative effects of the atmosphere. A) B) C) D) E) 6. What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 × 106 m around the Earth? (Mass of Earth = 6.0 × 1024 kg.) ...
STAR FORMATION (Ch. 19) The basics: GRAVITY vs. PRESSURE
... Cocoon stars—shrouded by dust (and gas) still falling onto the protostar, so glow mainly in the IR. All seen associated with molecular clouds and their fragments. Protostars—stars above the main sequence, presumably about to settle down to their main sequence lives. The T Tauri-type stars are the be ...
... Cocoon stars—shrouded by dust (and gas) still falling onto the protostar, so glow mainly in the IR. All seen associated with molecular clouds and their fragments. Protostars—stars above the main sequence, presumably about to settle down to their main sequence lives. The T Tauri-type stars are the be ...
ASTR220 Collisions in Space
... Bright and variable X-ray emission. Found high-mass star at approximate location of X-ray source. Found that star has very large velocity shifts (40 m/s in each direction)… … must be something very massive swinging it around! ...
... Bright and variable X-ray emission. Found high-mass star at approximate location of X-ray source. Found that star has very large velocity shifts (40 m/s in each direction)… … must be something very massive swinging it around! ...
ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... Use the text book starting on page 47 if you need extra resources. ...
... Use the text book starting on page 47 if you need extra resources. ...
THE INCREDIBLE ORIGIN OF THE CHEMICAL ELEMENTS
... Particles of matter falling towards a common centre of gravity accelerate and so gain kinetic energy: the matter becomes hotter. In the centre of such a mass of matter, the temperature eventually becomes high enough (about 10 million °C) to allow nuclear fusion to take place. Hydrogen nuclei collid ...
... Particles of matter falling towards a common centre of gravity accelerate and so gain kinetic energy: the matter becomes hotter. In the centre of such a mass of matter, the temperature eventually becomes high enough (about 10 million °C) to allow nuclear fusion to take place. Hydrogen nuclei collid ...
Regents Review Questions.Unit 2.Astronomy
... 11 Approximately how many days does Earth take to move from position A to position C? Base your answers to questions 12 and 13 on the diagram below, which shows Earth’s orbit and the orbit of a comet within our solar system. ...
... 11 Approximately how many days does Earth take to move from position A to position C? Base your answers to questions 12 and 13 on the diagram below, which shows Earth’s orbit and the orbit of a comet within our solar system. ...
Vital Chapter 7 Information
... 14. We can use the __________________ absorption lines as _______________ to find the temperature of stars. 15. The strength of the Balmer lines depends on the _____________ of the stars ___________ layers. 16. From stellar spectra, astronomers have found that stars have temperatures in what range? ...
... 14. We can use the __________________ absorption lines as _______________ to find the temperature of stars. 15. The strength of the Balmer lines depends on the _____________ of the stars ___________ layers. 16. From stellar spectra, astronomers have found that stars have temperatures in what range? ...
07 September: The Solar System in a Stellar Context
... The Sun could have exploded 7 minutes ago, and we would not have gotten the news yet! ...
... The Sun could have exploded 7 minutes ago, and we would not have gotten the news yet! ...
UNIT 3 INPUT 2: Notes on Black Holes (BH): Process of Formation
... Key terms: x-rays = dust particles pulled into black holes seed up and heat up and emit x-rays Rotating stars= Stars rotate around black holes when they are at a certain distance from the event horizon Gravity lenses: When a big object passes between a star and the Earth, the object acts like a len ...
... Key terms: x-rays = dust particles pulled into black holes seed up and heat up and emit x-rays Rotating stars= Stars rotate around black holes when they are at a certain distance from the event horizon Gravity lenses: When a big object passes between a star and the Earth, the object acts like a len ...
Chapter 27 Stars and Galaxies
... Cepheid (Sef-EE-id) variable star – Star’s brightness varies at a constant pattern Brightens and fades in a cycle that can be used to determine how far away it is ...
... Cepheid (Sef-EE-id) variable star – Star’s brightness varies at a constant pattern Brightens and fades in a cycle that can be used to determine how far away it is ...
STAR SYTEMS AND GALAXIES
... • Our sun is a single star but most stars are members of groups of two or more, called star systems. • Two star systems are called binary. Three star systems are called triple. • Proxima Centauri is probably a triple. Alpha Centauri A and Alpha Centauri B are part of a binary sytem. • In a binary s ...
... • Our sun is a single star but most stars are members of groups of two or more, called star systems. • Two star systems are called binary. Three star systems are called triple. • Proxima Centauri is probably a triple. Alpha Centauri A and Alpha Centauri B are part of a binary sytem. • In a binary s ...
blue_giant
... expands and becomes a red giant. and once the red giant has used up all of that fuel it condenses into a blue giant. ...
... expands and becomes a red giant. and once the red giant has used up all of that fuel it condenses into a blue giant. ...
15 Billion
... of Moon. Oldest fossils are about 3.8 by old. f. Mathematical models predict that stars the size of the Sun will undergo nuclear fusion in their core. g. All galaxies are red-shifting, i.e., the universe is expanding. Cosmic background radiation, a remnant of the big bang, is observed. h. Hubble spa ...
... of Moon. Oldest fossils are about 3.8 by old. f. Mathematical models predict that stars the size of the Sun will undergo nuclear fusion in their core. g. All galaxies are red-shifting, i.e., the universe is expanding. Cosmic background radiation, a remnant of the big bang, is observed. h. Hubble spa ...
Space Study Guide
... The dust and gas collapsed in on itself because of accretion (the coming together because of gravity) and formed the sun (same process as other stars). As the cloud collapsed, it formed into a rotating disk and spun faster and faster which caused it to flatten. Planetesimals, or particles that becom ...
... The dust and gas collapsed in on itself because of accretion (the coming together because of gravity) and formed the sun (same process as other stars). As the cloud collapsed, it formed into a rotating disk and spun faster and faster which caused it to flatten. Planetesimals, or particles that becom ...
Pluto`s Bald Cousin
... until it was downgraded to a dwarf planet like Makemake. Dwarf planets are basically too small to be labelled as planets, but they still are spherical objects – like planets – and bigger than asteroids. We know very little about our closer dwarf planets, and knew practically nothing about Makemake. ...
... until it was downgraded to a dwarf planet like Makemake. Dwarf planets are basically too small to be labelled as planets, but they still are spherical objects – like planets – and bigger than asteroids. We know very little about our closer dwarf planets, and knew practically nothing about Makemake. ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.