Study Guide: Use your notes and handouts to
... 35. What is a Hertzsprung Russell Diagram? 36. What is on the X axis of a HR Diagram? 37. What is on the Y axis of the HR Diagram? 38. What is used to determine luminosity? 39. How are main sequence stars represented on a HR Diagram? 40. Where would you find the white dwarf stars on a HR Diagram? 41 ...
... 35. What is a Hertzsprung Russell Diagram? 36. What is on the X axis of a HR Diagram? 37. What is on the Y axis of the HR Diagram? 38. What is used to determine luminosity? 39. How are main sequence stars represented on a HR Diagram? 40. Where would you find the white dwarf stars on a HR Diagram? 41 ...
Properties of Stars
... Characteristics of Stars • Color is a clue to a star’s temperature • Very hot (30,000 K) stars emit their light in the blue spectrum, red stars are much cooler, stars with temperatures between 5000 and 6000 K appear yellow • Binary Stars – pairs of stars, pulled together by gravity, that orbit each ...
... Characteristics of Stars • Color is a clue to a star’s temperature • Very hot (30,000 K) stars emit their light in the blue spectrum, red stars are much cooler, stars with temperatures between 5000 and 6000 K appear yellow • Binary Stars – pairs of stars, pulled together by gravity, that orbit each ...
Chapter 11 - USD Home Pages
... Answer: Quoting from page 355, “Apparent brightness decreases inversely with the square of the distance...” So, the ratio of the distances is 1/5, the the apparent brightness ratio is 52 = 25. The closer star looks 25 times as bright. 23. What is a radial velocity curve? What kinds of stellar system ...
... Answer: Quoting from page 355, “Apparent brightness decreases inversely with the square of the distance...” So, the ratio of the distances is 1/5, the the apparent brightness ratio is 52 = 25. The closer star looks 25 times as bright. 23. What is a radial velocity curve? What kinds of stellar system ...
Sky Notes - February 2012 - North Devon Astronomical Society
... surface temperature of around 10,000 degrees Celcius - about twice as hot as our Sun. In fact, it’s name is derived from the Greek ‘Seirios’ meaning ‘glowing’ or ‘scorcher’ - very appropriate. In addition, the star is somewhat larger than the Sun, more than twice as massive and around 25 times as lu ...
... surface temperature of around 10,000 degrees Celcius - about twice as hot as our Sun. In fact, it’s name is derived from the Greek ‘Seirios’ meaning ‘glowing’ or ‘scorcher’ - very appropriate. In addition, the star is somewhat larger than the Sun, more than twice as massive and around 25 times as lu ...
Stars - BrainBytes
... Middle aged star predicted to keep shining for 5 billion more years Diameter: 870,000 miles wide ...
... Middle aged star predicted to keep shining for 5 billion more years Diameter: 870,000 miles wide ...
Stars and Galaxies
... • Stars more massive than our Sun may be main sequence stars for only 10 million years • Stars less massive than our Sun may be main sequence stars for 100’s of billions of years • Remember: the larger the star the shorter the life span, the smaller the star the longer the life span ...
... • Stars more massive than our Sun may be main sequence stars for only 10 million years • Stars less massive than our Sun may be main sequence stars for 100’s of billions of years • Remember: the larger the star the shorter the life span, the smaller the star the longer the life span ...
Document
... Cepheid Variables: How to measure the distance to a galaxy using Cepheid variable stars: 1. Find the Cepheid, measure its spectrum 2. Measure a couple periods, and its apparent magnitude m 3. Look up its absolute magnitude 4. Use M = m - 5 log10(d/10) to find d ...
... Cepheid Variables: How to measure the distance to a galaxy using Cepheid variable stars: 1. Find the Cepheid, measure its spectrum 2. Measure a couple periods, and its apparent magnitude m 3. Look up its absolute magnitude 4. Use M = m - 5 log10(d/10) to find d ...
Diapositiva 1
... Ursa Minor is a constellation of the northern sky. It is especially known because within it lies the north celestial pole, although its position is subject to a continuous, slow movement due to the precession of the Earth's rotation. The Little Dipper is easily identifiable because, once detected th ...
... Ursa Minor is a constellation of the northern sky. It is especially known because within it lies the north celestial pole, although its position is subject to a continuous, slow movement due to the precession of the Earth's rotation. The Little Dipper is easily identifiable because, once detected th ...
Sample final
... axis? How would you classify (composition or type) this object? In other words, what is it? Essay section part one Choose two of the following discoveries, and determine if they are surprising (not consistent with current astronomical ideas) or not surprising (consistent). In either case, state clea ...
... axis? How would you classify (composition or type) this object? In other words, what is it? Essay section part one Choose two of the following discoveries, and determine if they are surprising (not consistent with current astronomical ideas) or not surprising (consistent). In either case, state clea ...
life and death of a high mass star 2
... AFTER THAT, THEY LOSE THEIR MASS AND HEAT AND BEGIN TO DIE. THIS PROCESS TAKES BILLIONS AND BILLIONS OF YEARS. ...
... AFTER THAT, THEY LOSE THEIR MASS AND HEAT AND BEGIN TO DIE. THIS PROCESS TAKES BILLIONS AND BILLIONS OF YEARS. ...
Chapter 27 Stars and Galaxies
... Apparent Magnitude The measurement of brightness is assigned a number on a scale – Brightest stars have lowest numbers – Dimmest stars have highest numbers ...
... Apparent Magnitude The measurement of brightness is assigned a number on a scale – Brightest stars have lowest numbers – Dimmest stars have highest numbers ...
Astronomy – Interpreting Main Sequence Star Data The
... Astronomy – Interpreting Main Sequence Star Data The classification of stars by surface temperature and spectral pattern is a painstaking process requiring the efforts of many scientists from hundreds of observatories around the world. To make it easier to refer to the different types of main sequen ...
... Astronomy – Interpreting Main Sequence Star Data The classification of stars by surface temperature and spectral pattern is a painstaking process requiring the efforts of many scientists from hundreds of observatories around the world. To make it easier to refer to the different types of main sequen ...
Starry Starry Night Vocabulary
... Star: A huge A self-luminous, gaseous celestial body which produces energy and whose size may be as small as the earth or larger than the earth’s orbit. The Sun is the closest star to Earth. Sun spots: Temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to su ...
... Star: A huge A self-luminous, gaseous celestial body which produces energy and whose size may be as small as the earth or larger than the earth’s orbit. The Sun is the closest star to Earth. Sun spots: Temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to su ...
Star Sizes
... find this star is to follow the handle of the Big Dipper. The handle arc, and if you follow the arc of the handle the first bright star you see is Arcturus. Let’s compare our star to a few other well-known stars. ...
... find this star is to follow the handle of the Big Dipper. The handle arc, and if you follow the arc of the handle the first bright star you see is Arcturus. Let’s compare our star to a few other well-known stars. ...
Foundation 1 - Discovering Astronomy
... become 1 helium nucleus • Since the mass of 4 hydrogen nuclei is greater than the mass of 1 helium nucleus, the leftover mass (0.7%) is converted to energy by Einstein’s equation: E=mc2 ...
... become 1 helium nucleus • Since the mass of 4 hydrogen nuclei is greater than the mass of 1 helium nucleus, the leftover mass (0.7%) is converted to energy by Einstein’s equation: E=mc2 ...
The magnitudes of stars
... Apparent magnitude and absolute magnitude How bright a star looks when viewed from the Earth is given by its apparent magnitude. However this does not give a true impression of the actual brightness of a star. A nearby faint star may well look brighter than another star that is actually brighter but ...
... Apparent magnitude and absolute magnitude How bright a star looks when viewed from the Earth is given by its apparent magnitude. However this does not give a true impression of the actual brightness of a star. A nearby faint star may well look brighter than another star that is actually brighter but ...
Astronomy Toolkit
... appears in the sky – Some faint stars are intrinsically bright, but are very distant – Some bright stars are very faint but happen to lie close to us ...
... appears in the sky – Some faint stars are intrinsically bright, but are very distant – Some bright stars are very faint but happen to lie close to us ...
HR DIAGRAM ACTIVITY
... 12. If you know a star’s color, you can determine its _________________ 13. (circle one) HOT or COLD stars have a shorter life span. 14. In the MAIN SEQUENCE, what color are the most massive stars? __________ In the MAIN SEQUENCE, what color are the least massive stars? __________ 15. You have disco ...
... 12. If you know a star’s color, you can determine its _________________ 13. (circle one) HOT or COLD stars have a shorter life span. 14. In the MAIN SEQUENCE, what color are the most massive stars? __________ In the MAIN SEQUENCE, what color are the least massive stars? __________ 15. You have disco ...
Characteristics of Stars Stars Analyzing Starlight Star Characteristics
... most common element - hydrogen second most common - helium ...
... most common element - hydrogen second most common - helium ...
Characteristics of Stars
... • Astronomers use a unit called the light year to measure distances between the stars • Light travels at a speed of 300,000 km/s • Light year- distance that light travels in one year =9.5 trillion km • Light year=unit of distance ...
... • Astronomers use a unit called the light year to measure distances between the stars • Light travels at a speed of 300,000 km/s • Light year- distance that light travels in one year =9.5 trillion km • Light year=unit of distance ...
stars concept review
... b. a large cloud of gas and dust in space where stars are born c. a shrinking, spinning region in space with a central concentration of matter d. a large explosion on a star that makes it brighter e. an object so dense that even light cannot escape its gravity ...
... b. a large cloud of gas and dust in space where stars are born c. a shrinking, spinning region in space with a central concentration of matter d. a large explosion on a star that makes it brighter e. an object so dense that even light cannot escape its gravity ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.