The Night Sky
... smaller magnitude while fainter stars have a larger magnitude. The brightest star, Sirius has a magnitude –1.4 The faintest stars visible to the unaided eye have a magnitude of about 6. ...
... smaller magnitude while fainter stars have a larger magnitude. The brightest star, Sirius has a magnitude –1.4 The faintest stars visible to the unaided eye have a magnitude of about 6. ...
Star project
... have their own gravity and have a fixed position in space. • They are extremely burning hot. • The nearest star to us is the sun. • They are made up of mainly hydrogen and helium, but have a little bit of other elements like oxygen and carbon as well. ...
... have their own gravity and have a fixed position in space. • They are extremely burning hot. • The nearest star to us is the sun. • They are made up of mainly hydrogen and helium, but have a little bit of other elements like oxygen and carbon as well. ...
Early history of astronomy
... • The motion of a body, such as a planet or moon, along a path around some point in space • Earth's orbit is elliptical • Earth is closest to the Sun (perihelion) in January • Earth is farthest from the Sun (aphelion) in July • The plane of the ecliptic is an imaginary plane that connects Earth's or ...
... • The motion of a body, such as a planet or moon, along a path around some point in space • Earth's orbit is elliptical • Earth is closest to the Sun (perihelion) in January • Earth is farthest from the Sun (aphelion) in July • The plane of the ecliptic is an imaginary plane that connects Earth's or ...
Measuring the size of small things Stellar Diameters Atmospheric Cherenkov Telescopes
... “I hung up a light rope in the direction of a star . . . and then by approaching and retreating from this cord placed between me and the star, I found the point where its width just hid the star from me. This done, I found the distance of my eye from the co ...
... “I hung up a light rope in the direction of a star . . . and then by approaching and retreating from this cord placed between me and the star, I found the point where its width just hid the star from me. This done, I found the distance of my eye from the co ...
Chapter 12
... Stars in a star cluster all have approximately the same age! More massive stars evolve more quickly ...
... Stars in a star cluster all have approximately the same age! More massive stars evolve more quickly ...
What is a Star?
... • The brightness a star would appear if it was set at a standard distance from Earth. – Astronomers calculate the stars apparent magnitude and it’s distance from Earth. – Then calculate the brightness if it were a standard distance from Earth. ...
... • The brightness a star would appear if it was set at a standard distance from Earth. – Astronomers calculate the stars apparent magnitude and it’s distance from Earth. – Then calculate the brightness if it were a standard distance from Earth. ...
Mining the MACHO dataset
... Feature Sets • Features are calculated to characterize the light curves. • Magnitudes are observed for both red and blue frequency range. • The difference between these is the logarithm of the ratio of intensities of blue and red light. Called the colour index. • Summary features of the light curve ...
... Feature Sets • Features are calculated to characterize the light curves. • Magnitudes are observed for both red and blue frequency range. • The difference between these is the logarithm of the ratio of intensities of blue and red light. Called the colour index. • Summary features of the light curve ...
HD 140283: A Star in the Solar Neighborhood that Formed Shortly
... We made FGS observations of HD 140283 at 11 epochs between 2003 August and 2011 March, at dates close to the biannual times of maximum parallax factor. The FGS are interferometers that, in addition to providing guiding control during imaging or spectroscopic observations, can measure precise positio ...
... We made FGS observations of HD 140283 at 11 epochs between 2003 August and 2011 March, at dates close to the biannual times of maximum parallax factor. The FGS are interferometers that, in addition to providing guiding control during imaging or spectroscopic observations, can measure precise positio ...
Scientific method, night sky, parallax, angular size
... Example: On November 28, 2000, the planet Jupiter was 609 million kilometers from Earth and had an angular diameter of 48.6″. Using the small-angle formula, determine Jupiter’s actual diameter. D = 48.6″ x 609,000,000 km / 206265 = 143,000 km ...
... Example: On November 28, 2000, the planet Jupiter was 609 million kilometers from Earth and had an angular diameter of 48.6″. Using the small-angle formula, determine Jupiter’s actual diameter. D = 48.6″ x 609,000,000 km / 206265 = 143,000 km ...
to the Stars and Constellations Fact
... Stars and Constellations The star closest to the earth is the ________. It is ________ million miles away from the earth! On a clear night there are approximately _________ stars that can be seen without a telescope. The telescope was invented in the year __________. A constellation is a group of st ...
... Stars and Constellations The star closest to the earth is the ________. It is ________ million miles away from the earth! On a clear night there are approximately _________ stars that can be seen without a telescope. The telescope was invented in the year __________. A constellation is a group of st ...
Planetary Configurations
... WDs in Binaries • Mass can transfer from a normal star to a WD, resulting in an accretion disk. • This is a disk of gas orbiting the WD with gas slowly “seeping” inward to the WD. • NOVAE: Hydrogen gas accumulates and heats up until fusion switches on. Leads to an explosion and ejection of mass. Re ...
... WDs in Binaries • Mass can transfer from a normal star to a WD, resulting in an accretion disk. • This is a disk of gas orbiting the WD with gas slowly “seeping” inward to the WD. • NOVAE: Hydrogen gas accumulates and heats up until fusion switches on. Leads to an explosion and ejection of mass. Re ...
Space Science Ch. 1 Notes - Mr. Ruggiero`s Science 8-2
... Galileo started it all with his hand-held telescope. It was powerful enough to see some of Jupiter’s moons and show that the Earth isn’t the center of the universe. Space exploration has mushroomed in the past 50 years. Rockets that originally lofted weapons during World War II were converted to car ...
... Galileo started it all with his hand-held telescope. It was powerful enough to see some of Jupiter’s moons and show that the Earth isn’t the center of the universe. Space exploration has mushroomed in the past 50 years. Rockets that originally lofted weapons during World War II were converted to car ...
chapter 18
... uranium to form lead, Pb. b) helium nuclei to form carbon nuclei. c) hydrogen nuclei to form helium nuclei. d) carbon nuclei to form magnesium nuclei. ...
... uranium to form lead, Pb. b) helium nuclei to form carbon nuclei. c) hydrogen nuclei to form helium nuclei. d) carbon nuclei to form magnesium nuclei. ...
Weekly Homework Questions #3, Sep. 14, 2010
... 1. How can one measure the mass of a star other than the Sun? (a) measuring the color of the star and using a color-mass relationship (b) the apparent magnitude of a star tells its mass (c) the gravitational force on a companion star in a double star (d) the mass of a star is determined by its locat ...
... 1. How can one measure the mass of a star other than the Sun? (a) measuring the color of the star and using a color-mass relationship (b) the apparent magnitude of a star tells its mass (c) the gravitational force on a companion star in a double star (d) the mass of a star is determined by its locat ...
Ordinary Stars - Edgewood High School
... If one star has a temperature of 10,000 K and another a temperature of 5,000 K, how much more energy does the hotter star put out? ...
... If one star has a temperature of 10,000 K and another a temperature of 5,000 K, how much more energy does the hotter star put out? ...
Friday, November 7 - Otterbein University
... • Some have names that go back to ancient times (e.g. Castor and Pollux, Greek mythology) • Some were named by Arab astronomers (e.g. Aldebaran, Algol, etc.) • Since the 17th century we use a scheme that lists stars by constellation – in order of their apparent brightness – labeled alphabetically in ...
... • Some have names that go back to ancient times (e.g. Castor and Pollux, Greek mythology) • Some were named by Arab astronomers (e.g. Aldebaran, Algol, etc.) • Since the 17th century we use a scheme that lists stars by constellation – in order of their apparent brightness – labeled alphabetically in ...
ASTR 200 : Lecture 15 Ensemble Properties of Stars
... • TA office hours Wed+Thurs as normal; Prof Gladman's Thursday office hour will be moved to Friday Oct 21, 1:30-2:30 ...
... • TA office hours Wed+Thurs as normal; Prof Gladman's Thursday office hour will be moved to Friday Oct 21, 1:30-2:30 ...
Locating Objects in Space
... Apparent Magnitude: how bright a star appears to be. Ranges from 1st – 6th magnitude, 1st is 100 times brighter than 6th Difference of 1 magnitude corresponds to a factor of 2.512 in brightness Does not take into account the distance of the star ...
... Apparent Magnitude: how bright a star appears to be. Ranges from 1st – 6th magnitude, 1st is 100 times brighter than 6th Difference of 1 magnitude corresponds to a factor of 2.512 in brightness Does not take into account the distance of the star ...
Introduction to Stars ppt
... bright. Giants are somewhat smaller in radius and lower in luminosity, but still much brighter than main sequence stars of same spectral type. The hot, white, small radius stars near the lower left are called white dwarfs. Giants and Supergiants are stars nearing the ends of their lives because they ...
... bright. Giants are somewhat smaller in radius and lower in luminosity, but still much brighter than main sequence stars of same spectral type. The hot, white, small radius stars near the lower left are called white dwarfs. Giants and Supergiants are stars nearing the ends of their lives because they ...
Useful Things to Study (#2)
... What’s the minimum temperature to run the proton-proton cycle in a star’s core? Why are Cepheids and RR Lyrae stars important? What is the period-luminosity relation? How does the life of a 10 solar mass star differ from the Sun’s life? What is degenerate electron matter? What is the maximum mass of ...
... What’s the minimum temperature to run the proton-proton cycle in a star’s core? Why are Cepheids and RR Lyrae stars important? What is the period-luminosity relation? How does the life of a 10 solar mass star differ from the Sun’s life? What is degenerate electron matter? What is the maximum mass of ...
Motions of the Celestial Sphere
... Stars are not a same distances. So, constellations are not real places. ...
... Stars are not a same distances. So, constellations are not real places. ...
Unit I – The Size, Shape and Motion of the Earth
... moon, planets, asteroids, etc, to work out their distances and speeds. The stars are much too distant! (Any return signal would take years!) Moreover, the return signal would be much too feeble to detect. ...
... moon, planets, asteroids, etc, to work out their distances and speeds. The stars are much too distant! (Any return signal would take years!) Moreover, the return signal would be much too feeble to detect. ...
H-R Diagram Student
... 4. Name a star that is very dim and red. ____________________________________________ 5. Compare our sun to Alpha Centauri A in terms of brightness, color and surface temperature.___________________________________________________________________ _____________________________________________________ ...
... 4. Name a star that is very dim and red. ____________________________________________ 5. Compare our sun to Alpha Centauri A in terms of brightness, color and surface temperature.___________________________________________________________________ _____________________________________________________ ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.