The magnitude scale, parallax, the parsec, and Cepheid distances
... Typically magnitudes are measured through a specific filter or bandpass Filters only allow light from a specifice wavelength range through Examples are ugriz or BVRI in the op;cal or YJHK in the near-‐IR ...
... Typically magnitudes are measured through a specific filter or bandpass Filters only allow light from a specifice wavelength range through Examples are ugriz or BVRI in the op;cal or YJHK in the near-‐IR ...
Spectral analysis for the RV Tau star R Sct: In this section, we will
... Many of our stars are monitored photometrically by the AAVSO. Their web site (http://www.aavso.org)) provides a light curve generator which can give (as the default) the latest few week time period or (what we usually need to do) a light curve covering the date of our specific spectroscopic observat ...
... Many of our stars are monitored photometrically by the AAVSO. Their web site (http://www.aavso.org)) provides a light curve generator which can give (as the default) the latest few week time period or (what we usually need to do) a light curve covering the date of our specific spectroscopic observat ...
Stars and Galaxies part 3
... • A star that varies in both brightness and size in a regular cycle is called a pulsating variable star. • The North Star (Polaris) is an example of a Cepheid variable, one kind of pulsating variable star. FYI: Polaris dims and brightens in a 4-day cycle, but not enough to detect with the naked eye. ...
... • A star that varies in both brightness and size in a regular cycle is called a pulsating variable star. • The North Star (Polaris) is an example of a Cepheid variable, one kind of pulsating variable star. FYI: Polaris dims and brightens in a 4-day cycle, but not enough to detect with the naked eye. ...
Chapter 16 - "The Universe"
... • This may create a reversal of the big bang where all energy is locked up and attractive forces in the black holes will swallow up all of space until all of space has been condensed to a pinhead. ...
... • This may create a reversal of the big bang where all energy is locked up and attractive forces in the black holes will swallow up all of space until all of space has been condensed to a pinhead. ...
Trainer`s Notes
... The planets in our solar system, starting from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was also considered a planet from 1930 until 2006 when the International Astronomer's Union (IAU) was prompted by the discovery Eris, a body larger than Pluto, to come ...
... The planets in our solar system, starting from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was also considered a planet from 1930 until 2006 when the International Astronomer's Union (IAU) was prompted by the discovery Eris, a body larger than Pluto, to come ...
PowerPoint file - Northwest Creation Network
... stable’, suggests Galen Gisler, an astronomer at the Los Alamos National Laboratory in New Mexico.” ...
... stable’, suggests Galen Gisler, an astronomer at the Los Alamos National Laboratory in New Mexico.” ...
SSG Coordinators will be at the Cronan Ranch observing site at 6
... (S&T Pocket Sky Atlas – pg 31) The constellation Draco (DRAY-co) the dragon is not an easy field to play in. The area around the dragon’s tail, however, does have an interesting galaxy that rewards the star-hopper. The brightest star due east of M81-82 is the very tip of the dragons tail. Known as G ...
... (S&T Pocket Sky Atlas – pg 31) The constellation Draco (DRAY-co) the dragon is not an easy field to play in. The area around the dragon’s tail, however, does have an interesting galaxy that rewards the star-hopper. The brightest star due east of M81-82 is the very tip of the dragons tail. Known as G ...
HR Diagram Activity - Mr. Alster`s Science Classes
... 11. Are these stars hot or cool compared to other stars? 12. Is the relationship of brightness to temperature for these stars puzzling, or does it make sense? Explain. Additional Questions 13. As you can see from the Group 1 stars, the cooler or hotter a star is, the brighter it will be. The Group 2 ...
... 11. Are these stars hot or cool compared to other stars? 12. Is the relationship of brightness to temperature for these stars puzzling, or does it make sense? Explain. Additional Questions 13. As you can see from the Group 1 stars, the cooler or hotter a star is, the brighter it will be. The Group 2 ...
Famous Constellations
... • Star maps are made of brightest stars and patterns that are seen • In the United States, we see constellations only in the Milky Way • They help us find certain constellations ...
... • Star maps are made of brightest stars and patterns that are seen • In the United States, we see constellations only in the Milky Way • They help us find certain constellations ...
Chapter 15 (Star Lives)
... D. are at different stages of their lives. 2. In making a model of a star, an astronomer does NOT have to know or assume: A. that the energy given off is produced in the interior. B. the mass of the star. C. the chemical composition of the star. D. the distance to that star. 3. For a star like our s ...
... D. are at different stages of their lives. 2. In making a model of a star, an astronomer does NOT have to know or assume: A. that the energy given off is produced in the interior. B. the mass of the star. C. the chemical composition of the star. D. the distance to that star. 3. For a star like our s ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2006. 1
... 2 Com ds (6.0, 7.5) separation 3.6". Use high power when seeing is good. 24 Com ds. (5.0,6.5) separation 20.3" Wide contrasting yellow and blue pair. 35 Com ds. (5.1,7,2) separation 1.2”. Yellow and purple (deep blue). Coma is a fine hunting ground for galaxies plus a very fine globular cluster. Sta ...
... 2 Com ds (6.0, 7.5) separation 3.6". Use high power when seeing is good. 24 Com ds. (5.0,6.5) separation 20.3" Wide contrasting yellow and blue pair. 35 Com ds. (5.1,7,2) separation 1.2”. Yellow and purple (deep blue). Coma is a fine hunting ground for galaxies plus a very fine globular cluster. Sta ...
Stellar Classification and Evolution What is a star? A cloud of gas
... from helium fusion _____________ much of their mass The ejected material expands and cools, becoming a planetary ________________ (which actually has nothing to do with planets, but we didn’t know that in the 18th century when Herschel coined the term) The core _____________________ to form a Wh ...
... from helium fusion _____________ much of their mass The ejected material expands and cools, becoming a planetary ________________ (which actually has nothing to do with planets, but we didn’t know that in the 18th century when Herschel coined the term) The core _____________________ to form a Wh ...
12.4 Evolution of Stars More Massive than the Sun
... Massive than the Sun A star of more than 8 solar masses can fuse elements far beyond carbon in its core, leading to a very different fate. Its path across the H-R diagram is essentially a straight line – it stays as just about the same luminosity as it cools off. Eventually the star dies in a violen ...
... Massive than the Sun A star of more than 8 solar masses can fuse elements far beyond carbon in its core, leading to a very different fate. Its path across the H-R diagram is essentially a straight line – it stays as just about the same luminosity as it cools off. Eventually the star dies in a violen ...
Lecture16
... Stars differ in mass (from 10% of the sun’s mass, to 150× the sun’s mass). ...and radius (from the size of earth to the size of jupiter’s orbit!). ...and color (from deep red, to blue). ... but otherwise, stars are almost ...
... Stars differ in mass (from 10% of the sun’s mass, to 150× the sun’s mass). ...and radius (from the size of earth to the size of jupiter’s orbit!). ...and color (from deep red, to blue). ... but otherwise, stars are almost ...
Star Lifecycle
... off pulses of radio sources. Left over from super massive star supernovas. Black Holes – From the most massive stars (More than 40 times bigger than our sun). Nothing can escape the gravity of a black hole, not even light. ...
... off pulses of radio sources. Left over from super massive star supernovas. Black Holes – From the most massive stars (More than 40 times bigger than our sun). Nothing can escape the gravity of a black hole, not even light. ...
Properties of Stars - Mr. Carter`s Earth
... The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were all the same distance away. Rather than speak of the brightness of ...
... The Hertzsprung-Russell diagram is actually a graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude, which is how bright they would appear to be if they were all the same distance away. Rather than speak of the brightness of ...
Stars - Science
... are red. Medium temperature stars are orange and yellow. The hottest stars are blue. ...
... are red. Medium temperature stars are orange and yellow. The hottest stars are blue. ...
STAR FORMATION (Ch. 19) The basics: GRAVITY vs. PRESSURE
... we’ll return to this). Make sure you understand the H-R diagrams in Figs. 19.1819.19. Can you explain what determines the lifetime of a star clusters? Why do open clusters survive (on average) for a much shorter time than globular clusters? (This is actually a fairly complicated question, but a good ...
... we’ll return to this). Make sure you understand the H-R diagrams in Figs. 19.1819.19. Can you explain what determines the lifetime of a star clusters? Why do open clusters survive (on average) for a much shorter time than globular clusters? (This is actually a fairly complicated question, but a good ...
Star Classification
... The ancient Greeks thought this group of stars looked like a hunter, so they named it Orion after their mythical hunter. The line of three stars at the center is "Orion’s Belt." The many different colors of stars reflect the star’s temperature. The bright, red star in the upper left (with an arrow p ...
... The ancient Greeks thought this group of stars looked like a hunter, so they named it Orion after their mythical hunter. The line of three stars at the center is "Orion’s Belt." The many different colors of stars reflect the star’s temperature. The bright, red star in the upper left (with an arrow p ...
Slide 1 - Physics @ IUPUI
... • RR Lyrae have periods of about 0.3 to 0.5 days. • A) Why do you think those periods are so short? • B) Why is this length of period a really bad thing when it comes to observing the star (hint, when can a good telescope look at stars?)? ...
... • RR Lyrae have periods of about 0.3 to 0.5 days. • A) Why do you think those periods are so short? • B) Why is this length of period a really bad thing when it comes to observing the star (hint, when can a good telescope look at stars?)? ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.