Analyzing Spectra
... black lines are caused by elements in the star's atmosphere. As light emitted from a star passes through the star's atmosphere, some of it is absorbed by elements in the atmosphere. The wavelengths of the light that are absorbed appear as dark lines in the spectrum. Each element absorbs certain wave ...
... black lines are caused by elements in the star's atmosphere. As light emitted from a star passes through the star's atmosphere, some of it is absorbed by elements in the atmosphere. The wavelengths of the light that are absorbed appear as dark lines in the spectrum. Each element absorbs certain wave ...
Earth Space Systems Semester 1 Exam Astronomy Vocabulary Astronomical Unit-
... called a White Dwarf. White Dwarfs are about the size of our Earth but still have a mass near the original Main Sequence star. Eventually the White Dwarf will dim and become a Black Dwarf. After the Variable stage of a Large Mass star, a tremendous explosion occurs resulting in a Supernova and a sur ...
... called a White Dwarf. White Dwarfs are about the size of our Earth but still have a mass near the original Main Sequence star. Eventually the White Dwarf will dim and become a Black Dwarf. After the Variable stage of a Large Mass star, a tremendous explosion occurs resulting in a Supernova and a sur ...
Study Guide for 3RD Astronomy Exam
... Describe the physical characteristics of a giant molecular cloud Identify the source of heating (energy production) in proto-stars Explain why more low-mass K & M main sequence stars form rather than the high-mass O & B stars. List the mass limits of stars and explain why these limits apply. Describ ...
... Describe the physical characteristics of a giant molecular cloud Identify the source of heating (energy production) in proto-stars Explain why more low-mass K & M main sequence stars form rather than the high-mass O & B stars. List the mass limits of stars and explain why these limits apply. Describ ...
printer-friendly sample test questions
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
bright - TutorPlus
... • The brightness of stars as viewed from Earth is often measured using the apparent magnitude scale. • The smaller the value, the brighter the star. • The Sun has a value of -27. A full moon has value -13. ...
... • The brightness of stars as viewed from Earth is often measured using the apparent magnitude scale. • The smaller the value, the brighter the star. • The Sun has a value of -27. A full moon has value -13. ...
d = 1 / p
... one parsec is the distance to a star with a parallax of one arcsecond (an arcsecond is 1/3600 of a degree), which works out to 206265 AU, 3.09 × 1013 km, or 3.261 light years. When we use this unit, the distance (in parsecs) is simply equal to one over the parallax angle (in arcseconds). This techni ...
... one parsec is the distance to a star with a parallax of one arcsecond (an arcsecond is 1/3600 of a degree), which works out to 206265 AU, 3.09 × 1013 km, or 3.261 light years. When we use this unit, the distance (in parsecs) is simply equal to one over the parallax angle (in arcseconds). This techni ...
SGES 1302 INTRODUCTION TO EARTH SYSTEM
... It is extremely difficult to define the age of the Milky Way, but the age of the oldest stars in the Galaxy is currently estimated to be about 13.6 billion years, which is nearly as old as the Universe itself. ...
... It is extremely difficult to define the age of the Milky Way, but the age of the oldest stars in the Galaxy is currently estimated to be about 13.6 billion years, which is nearly as old as the Universe itself. ...
d = 1 / p
... Never confuse the radius of the star R with the distance to the star d! Although both are measures of length that appear in our equations squared and multiplied by 4π, they are extremely different! In addition, keep in mind that the Stefan-Boltzmann law tells you the total luminosity in all waveband ...
... Never confuse the radius of the star R with the distance to the star d! Although both are measures of length that appear in our equations squared and multiplied by 4π, they are extremely different! In addition, keep in mind that the Stefan-Boltzmann law tells you the total luminosity in all waveband ...
Measuring Distance with Spectroscopic Parallax
... Finding Luminosity Using the HR Diagram At the end of this activity packet is an HR diagram that you made earlier in this course. The Luminosity of the stars (in units of Suns) is plotted versus the Temperature of the stars in Kelvin (in reverse order). When using this graph, remember that the verti ...
... Finding Luminosity Using the HR Diagram At the end of this activity packet is an HR diagram that you made earlier in this course. The Luminosity of the stars (in units of Suns) is plotted versus the Temperature of the stars in Kelvin (in reverse order). When using this graph, remember that the verti ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... tells us that most of the matter is dimmer than the Sun out to the Sun’s orbit • Mass-to-Light ratio of our Sun is 1 solar mass per solar luminosity • So most matter is dimmer than the Sun ...
... tells us that most of the matter is dimmer than the Sun out to the Sun’s orbit • Mass-to-Light ratio of our Sun is 1 solar mass per solar luminosity • So most matter is dimmer than the Sun ...
WFPC2
... •WFPC 2 was installed during Hubble’s 1st Servicing Mission, in December of 1993 •WFPC 2 replaced the original WFPC, and contained corrective optics to compensate for the spherical aberration caused by the flawed main mirror •WFPC 2 remained in orbit for 15 years, until replaced by WFPC 3 in May of ...
... •WFPC 2 was installed during Hubble’s 1st Servicing Mission, in December of 1993 •WFPC 2 replaced the original WFPC, and contained corrective optics to compensate for the spherical aberration caused by the flawed main mirror •WFPC 2 remained in orbit for 15 years, until replaced by WFPC 3 in May of ...
Study Guide for 3RD Astronomy Exam
... Write an outline summarizing the net p-p chain, defining symbols and discussing the origin of each. Discuss thermalization and the rate of mass loss. Write the definition of a parsec. Convert 500 pc into ly and 500 ly into pc. Verify that a star with a parallax 0.00229” is at a distance of 2,600 ly. ...
... Write an outline summarizing the net p-p chain, defining symbols and discussing the origin of each. Discuss thermalization and the rate of mass loss. Write the definition of a parsec. Convert 500 pc into ly and 500 ly into pc. Verify that a star with a parallax 0.00229” is at a distance of 2,600 ly. ...
What is a star?
... • Astronomers used telescopes see many stars that are too dim to see with the unaided eye. They added to the magnitude system. • Today, the brightest stars have a magnitude of about –2, and the faintest stars that we can see with a telescope have a magnitude of +30. • Dim stars have positive (larger ...
... • Astronomers used telescopes see many stars that are too dim to see with the unaided eye. They added to the magnitude system. • Today, the brightest stars have a magnitude of about –2, and the faintest stars that we can see with a telescope have a magnitude of +30. • Dim stars have positive (larger ...
Stars and Stellar Evolution
... Balanced between forces of gravity (trying to squeeze into smaller space) and gas pressure (trying to expand it) Hydrogen fusion for few billion years ...
... Balanced between forces of gravity (trying to squeeze into smaller space) and gas pressure (trying to expand it) Hydrogen fusion for few billion years ...
Oceanography Chapter 1 – “Origins”
... • Hydrogen atoms: – the most common form of matter in the universe. • Atoms have mass. Clump together under gravity. • Formation of elements: – He through Fe (iron) inside stars (nuclear fusion) – Heavier elements in supernova explosion (Fe & beyond) ...
... • Hydrogen atoms: – the most common form of matter in the universe. • Atoms have mass. Clump together under gravity. • Formation of elements: – He through Fe (iron) inside stars (nuclear fusion) – Heavier elements in supernova explosion (Fe & beyond) ...
the galaxy in which we live - Cosmos
... gravitationally bound forming a much larger structure: our Milky Way Galaxy. There are huge numbers of galaxies apart from our own, constituting the basic structural units of the Universe. ...
... gravitationally bound forming a much larger structure: our Milky Way Galaxy. There are huge numbers of galaxies apart from our own, constituting the basic structural units of the Universe. ...
Reach for the Stars B
... 14. This is one of several DSOs on this year’s list designated by “M”. Who is the “M” catalogue named after? 15. Name one of the planetary nebulae on this year’s list. 16. During which phase of the star’s life was the material in these planetary nebulae ejected? 17. What is one possible cause of pla ...
... 14. This is one of several DSOs on this year’s list designated by “M”. Who is the “M” catalogue named after? 15. Name one of the planetary nebulae on this year’s list. 16. During which phase of the star’s life was the material in these planetary nebulae ejected? 17. What is one possible cause of pla ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.