![Astronomy](http://s1.studyres.com/store/data/003046079_1-76d30f18c4da405bb07f665984eba037-300x300.png)
Astronomy
... pressure causes the temperature to rise to 27 million degrees F, high enough for fusion to begin. ...
... pressure causes the temperature to rise to 27 million degrees F, high enough for fusion to begin. ...
PHY-105: Equations of Stellar Structure
... also a function or r) – see previous handout for more discussion of opacity. These 4 equations have 7 unknowns (at a given r): P , Mr , Lr , T , ρ, ǫ, κ. So in general we require expressions for P , κ, and ǫ in terms of ρ, T , and the compositions. These can be complicated, but for example if we ass ...
... also a function or r) – see previous handout for more discussion of opacity. These 4 equations have 7 unknowns (at a given r): P , Mr , Lr , T , ρ, ǫ, κ. So in general we require expressions for P , κ, and ǫ in terms of ρ, T , and the compositions. These can be complicated, but for example if we ass ...
Finding North and South
... Imagine a line drawn through the main axis of the cross. Now extend that line 4½ times the length of the longest axis, extending out from the furthest star. A line from this point to the ground will give you the direction of true south. ...
... Imagine a line drawn through the main axis of the cross. Now extend that line 4½ times the length of the longest axis, extending out from the furthest star. A line from this point to the ground will give you the direction of true south. ...
Name the terms - St John Brebeuf
... 10.Mars has an atmosphere composed mainly of nitrogen and oxygen. _________________________ 11.Ptolemy devised the heliocentric model. ________ 12.Kepler first proposed that the Earth revolves around the Sun. _________________________ 13.It takes Mars longer than Earth to orbit around the Sun. _____ ...
... 10.Mars has an atmosphere composed mainly of nitrogen and oxygen. _________________________ 11.Ptolemy devised the heliocentric model. ________ 12.Kepler first proposed that the Earth revolves around the Sun. _________________________ 13.It takes Mars longer than Earth to orbit around the Sun. _____ ...
Comparing Earth, Sun and Jupiter
... Globular clusters are much older systems and contain tens of thousands of stars A galaxy is a system of several billion stars and star clusters, gravitationally bound and orbiting a common centre of mass Galaxies themselves form groups and clusters ...
... Globular clusters are much older systems and contain tens of thousands of stars A galaxy is a system of several billion stars and star clusters, gravitationally bound and orbiting a common centre of mass Galaxies themselves form groups and clusters ...
Stars…Giants, Supergiants, Dwarfs….
... When the pressure goes up, atoms “feel their neighbors” and have identity crises. The atomic energy levels, instead of being crisp and unique, get “fuzzed out”. “Fuzzed out” is technical terminology for a change in the energy which depends on how close the neighbors are, how many of them there are, ...
... When the pressure goes up, atoms “feel their neighbors” and have identity crises. The atomic energy levels, instead of being crisp and unique, get “fuzzed out”. “Fuzzed out” is technical terminology for a change in the energy which depends on how close the neighbors are, how many of them there are, ...
Binocular Universe: Bikini Bottom
... the same field of view. While Algedi's two stars appear identically bright, Dabih's two stars look markedly different. The brighter sun, called Dabih-Major, shines at 3rd magnitude, while its companion, Dabih-Minor, is 16 times fainter at 6th magnitude. They may look different, but studies show that ...
... the same field of view. While Algedi's two stars appear identically bright, Dabih's two stars look markedly different. The brighter sun, called Dabih-Major, shines at 3rd magnitude, while its companion, Dabih-Minor, is 16 times fainter at 6th magnitude. They may look different, but studies show that ...
Review Guide
... 14. What is a nebula? 15. What force causes stars to form? 16. What do we call a beginning star that is not yet hot enough to engage in nuclear fusion? 17. What is the main fuel source of stars? Which element? ...
... 14. What is a nebula? 15. What force causes stars to form? 16. What do we call a beginning star that is not yet hot enough to engage in nuclear fusion? 17. What is the main fuel source of stars? Which element? ...
Chapter 1 Daily Note Sheets Completed Power Point
... • -In the Universe • In the Solar System • 3rd planet from the Sun ...
... • -In the Universe • In the Solar System • 3rd planet from the Sun ...
Earth`s Motion and Seasons
... The Hubble Telescope is a reflecting telescope with a mirror 2.4 meters in diameter. Because it orbits Earth above the atmosphere, it can produce very detailed images. Hubble images have changed how astronomers view the universe. The most recent addition to NASA’s lineup of telescopes in space is th ...
... The Hubble Telescope is a reflecting telescope with a mirror 2.4 meters in diameter. Because it orbits Earth above the atmosphere, it can produce very detailed images. Hubble images have changed how astronomers view the universe. The most recent addition to NASA’s lineup of telescopes in space is th ...
After Dark M S
... both are supernovas, the natures of these two exploding stars are very different. The supernova in M51 may mark the death of a massive star. The supernova in M101 may mark the death of a white dwarf star in a binary star system. The discovery and origins of these two exploding stars, more than 20 mi ...
... both are supernovas, the natures of these two exploding stars are very different. The supernova in M51 may mark the death of a massive star. The supernova in M101 may mark the death of a white dwarf star in a binary star system. The discovery and origins of these two exploding stars, more than 20 mi ...
Grade 9 Science – Unit 4
... The Sun The most important star for Earth is the Sun. Why? The Sun provides heat and light energy for all living things The Sun’s gravitational pull keeps Earth in a steady orbit (i.e., the right distance to support life). How is heat and light energy produced? NUCLEAR FUSION – under extremely ...
... The Sun The most important star for Earth is the Sun. Why? The Sun provides heat and light energy for all living things The Sun’s gravitational pull keeps Earth in a steady orbit (i.e., the right distance to support life). How is heat and light energy produced? NUCLEAR FUSION – under extremely ...
August
... M13 At a distance of 25,100 light years, this globular cluster in the constellation Hercules (HER-cueleez) is about 145 light years in diameter. The age of M13 has been estimated at over 10 billion years. It contains over 300,000 stars. At the center, stars are about 500 times more concentrated than ...
... M13 At a distance of 25,100 light years, this globular cluster in the constellation Hercules (HER-cueleez) is about 145 light years in diameter. The age of M13 has been estimated at over 10 billion years. It contains over 300,000 stars. At the center, stars are about 500 times more concentrated than ...
Excellence
... White dwarfs form when a star dies. They don’t have a fuel source so are slowly cooling over time. They range in temperature from 7, 500 – 30, 000 K. This is quite hot compared to the red giants which are still burning fuel but it makes sense when you compare their surface area and mass. White dwarf ...
... White dwarfs form when a star dies. They don’t have a fuel source so are slowly cooling over time. They range in temperature from 7, 500 – 30, 000 K. This is quite hot compared to the red giants which are still burning fuel but it makes sense when you compare their surface area and mass. White dwarf ...
hubble amazing universe worksheet
... 10. Someday, our own star will expand and engulf the earth. Luckily, this will happen in ________________billion years. 11. Some stars are 100 times more massive that our sun. When a star explodes, it’s called a _____________________. Our sun will not go supernova because it’s not ________________ e ...
... 10. Someday, our own star will expand and engulf the earth. Luckily, this will happen in ________________billion years. 11. Some stars are 100 times more massive that our sun. When a star explodes, it’s called a _____________________. Our sun will not go supernova because it’s not ________________ e ...
Document
... And we know how bright it should be, Result Distance We do this everyday with size. ...
... And we know how bright it should be, Result Distance We do this everyday with size. ...
etlife_douglas_ewart_short
... Star + planet orbit about centre of gravity We can also see the motion of the star from its spectral lines. ...
... Star + planet orbit about centre of gravity We can also see the motion of the star from its spectral lines. ...
Microlensing in NZ
... source stars Hence a few transit events should occur per year with free-floating planets and main sequence sources Duration is shorter, magnification is less, and the lens must be nearby for a mass measurement. Detection rate will be low - a challenge for LCOGT But can be done simultaneously while m ...
... source stars Hence a few transit events should occur per year with free-floating planets and main sequence sources Duration is shorter, magnification is less, and the lens must be nearby for a mass measurement. Detection rate will be low - a challenge for LCOGT But can be done simultaneously while m ...
the size and structure of the universe
... are balls of gas that produce their own energy by the process of NUCLEAR FUSION; they are the major features of galaxies – diameter of the sun (an average star) = 870,000 miles (1,392,000 km.) – That’s over 100,000 times the diameter of the Earth. Over 1,000,000 Earths could fit inside of the Sun ...
... are balls of gas that produce their own energy by the process of NUCLEAR FUSION; they are the major features of galaxies – diameter of the sun (an average star) = 870,000 miles (1,392,000 km.) – That’s over 100,000 times the diameter of the Earth. Over 1,000,000 Earths could fit inside of the Sun ...
Reviewing concepts covered this year Looking Back
... Cosmic Background Radiation: left over from a Big Bang 3. Lines are shifted more into the red portion of the electromagnetic scale 4. Spectral line pattern / signature lines / unique composition 5. Away 6. Blue 7. Red 8. Hubble 9. Fusion ...
... Cosmic Background Radiation: left over from a Big Bang 3. Lines are shifted more into the red portion of the electromagnetic scale 4. Spectral line pattern / signature lines / unique composition 5. Away 6. Blue 7. Red 8. Hubble 9. Fusion ...
IK Pegasi
![](https://commons.wikimedia.org/wiki/Special:FilePath/Location_of_IK_Pegasi.png?width=300)
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.