Astronomy I Ex.2
... What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: 3.97 × 1018 cm c) Approximate distanc ...
... What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: 3.97 × 1018 cm c) Approximate distanc ...
Telescopes (continued). Properties of Stars.
... visible region, we can calculate only the visiblelight luminosity. ...
... visible region, we can calculate only the visiblelight luminosity. ...
Astronomers classify stars according to their physical characteristics
... •A star’s _apparent_ brightness depends upon how bright it _actually is and its _distance_ from Earth. •A star’s actual brightness (or _absolute magnitude) usually depends on the star’s _size_ and temperature__. •Because stars with _more mass ___ have more __self _gravity, they tend to have _higher_ ...
... •A star’s _apparent_ brightness depends upon how bright it _actually is and its _distance_ from Earth. •A star’s actual brightness (or _absolute magnitude) usually depends on the star’s _size_ and temperature__. •Because stars with _more mass ___ have more __self _gravity, they tend to have _higher_ ...
The Stars
... • Stellar properties are determined solely by their mass, composition, age, and rotation rate. • The properties of main sequence stars are largely determined by their masses. • Single stars are spherical, unless distorted by rotation ...
... • Stellar properties are determined solely by their mass, composition, age, and rotation rate. • The properties of main sequence stars are largely determined by their masses. • Single stars are spherical, unless distorted by rotation ...
1.1 Stars in the Broader Context of Modern Astro
... • ‘The epoch of reionisation’, which has been described as the ‘last frontier in observational cosmology’ marks the period—approximately 600 million years after the Big Bang—when the Universe experienced its last ‘phase-change’: it changed from being mostly neutral to being mostly ionised (see Figur ...
... • ‘The epoch of reionisation’, which has been described as the ‘last frontier in observational cosmology’ marks the period—approximately 600 million years after the Big Bang—when the Universe experienced its last ‘phase-change’: it changed from being mostly neutral to being mostly ionised (see Figur ...
Main-sequence stars - Stellar Populations
... Most of this information you already figured out yourself during the inquiry A little extra information is included to connect some of those ideas together By Marc Rafelski Parts of this are © 2006 Pearson Education Inc, publishing as Addison-Wesley ...
... Most of this information you already figured out yourself during the inquiry A little extra information is included to connect some of those ideas together By Marc Rafelski Parts of this are © 2006 Pearson Education Inc, publishing as Addison-Wesley ...
Stellar Properties
... what would be the distance to the star? A)1/5, b)1. c)5, d)25 pc 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. A ...
... what would be the distance to the star? A)1/5, b)1. c)5, d)25 pc 2. Star A and B have same luminosity. If star A is 4 times closer to Earth then star B, then _____ to earthly viewer.: a=A is 4 x brighter, b=B is 4x brighter, c=A is 16 times brighter d=B is 16 times brighter, e=A is 64x brighter 3. A ...
The Characteristics of the Cool Component of the Cataclysmic
... Variable AE Aquarii From HIPPARCOS Observations Michael Friedjung Institut d’Astrophysique (CNRS), 98 bis Boulevard Arago, 75014 Paris, France Abstract The parallax of the cataclysmic binary AE Aquarii, found using the HIPPARCOS satellite, is combined with published infrared observations. Indicatio ...
... Variable AE Aquarii From HIPPARCOS Observations Michael Friedjung Institut d’Astrophysique (CNRS), 98 bis Boulevard Arago, 75014 Paris, France Abstract The parallax of the cataclysmic binary AE Aquarii, found using the HIPPARCOS satellite, is combined with published infrared observations. Indicatio ...
HW4 due - Yale Astronomy
... measured accurately with HST is actually a fraction of one resolution element, or about 0.005 arcsecond. ...
... measured accurately with HST is actually a fraction of one resolution element, or about 0.005 arcsecond. ...
Astronomy Quiz 12 “Stars
... A. white dwarfs / red giant C. red giants / blue dwarfs B. yellow dwarfs / red supergiant D. red dwarfs / blue supergiant _____3. The actual 3D motion of stars relative to each other in a rotating and swirling galaxy is called __ motion. A. radial B. proper C. real D. transverse _____4. How far away ...
... A. white dwarfs / red giant C. red giants / blue dwarfs B. yellow dwarfs / red supergiant D. red dwarfs / blue supergiant _____3. The actual 3D motion of stars relative to each other in a rotating and swirling galaxy is called __ motion. A. radial B. proper C. real D. transverse _____4. How far away ...
Review 2
... Main features of Uranus and Neptune and of the Galilean moons of Jupiter. Structure of a comet. The asteroid belt and the Oort cloud. Why do we have meteor showers during specific days of a year? Chapter 16: How do we use the atomic emission and absorption spectra to find the composition of a star? ...
... Main features of Uranus and Neptune and of the Galilean moons of Jupiter. Structure of a comet. The asteroid belt and the Oort cloud. Why do we have meteor showers during specific days of a year? Chapter 16: How do we use the atomic emission and absorption spectra to find the composition of a star? ...
OBAFGKM
... Leonardo and Guinevere are two stars that have the same apparent brightness. Leonardo has a larger parallax angle than Guinevere. Which star is more luminous? ...
... Leonardo and Guinevere are two stars that have the same apparent brightness. Leonardo has a larger parallax angle than Guinevere. Which star is more luminous? ...
Starry Starry Night Vocabulary
... Gravity: The natural force that causes things to fall toward the earth. Gravity attracts a body toward any other physical body having mass. The Earth's gravity keeps us grounded and causes objects to fall. Hypergiant stars: The largest stars in the universe, even larger than supergiants. This star h ...
... Gravity: The natural force that causes things to fall toward the earth. Gravity attracts a body toward any other physical body having mass. The Earth's gravity keeps us grounded and causes objects to fall. Hypergiant stars: The largest stars in the universe, even larger than supergiants. This star h ...
Sample Assessment Items
... of how this standard might be assessed. Please use these as an example when you are developing your own formative assessments. Remember formative assessment is to be given throughout the teaching of a standard to help you guide your instruction based on students needs. A good formative assessment sh ...
... of how this standard might be assessed. Please use these as an example when you are developing your own formative assessments. Remember formative assessment is to be given throughout the teaching of a standard to help you guide your instruction based on students needs. A good formative assessment sh ...
Astronomy review - Petal School District
... (no man has ever been farther than the moon) One way: space telescopes! the Hubble Space Telescope (looks at distant galaxies & at planets in our solar system) ...
... (no man has ever been farther than the moon) One way: space telescopes! the Hubble Space Telescope (looks at distant galaxies & at planets in our solar system) ...
Press release - ASTRONOMY GROUP – University of St Andrews
... Researcher Dr Alan Penny will use the brightness of half a dozen stars to refine estimates of how big the Universe actually is. Dr Penny hopes to solve the problem using the ‘extreme precision’ of NASA’s Kepler satellite launched into space last month. Developed for the search for new planets, Keple ...
... Researcher Dr Alan Penny will use the brightness of half a dozen stars to refine estimates of how big the Universe actually is. Dr Penny hopes to solve the problem using the ‘extreme precision’ of NASA’s Kepler satellite launched into space last month. Developed for the search for new planets, Keple ...
Seasonal Motion
... of this curved surface onto a plane sheet of paper • Let’s explore our turning star map! ...
... of this curved surface onto a plane sheet of paper • Let’s explore our turning star map! ...
1. absolute brightness -
... stars, few parsecs across, less than 20 million years old (comparatively young) • Globular cluster - tightly packed stars, 10,000’s to millions of stars, about 50 parsecs across, at least ...
... stars, few parsecs across, less than 20 million years old (comparatively young) • Globular cluster - tightly packed stars, 10,000’s to millions of stars, about 50 parsecs across, at least ...
Jupiter-Sized Star Smallest Ever Detected
... Jupiter and nevertheless end up with a star that is This new set of observations thus almost triples the only slightly larger", suggests Claudio Melo from number of low-mass stars for which precise radii ESO and member of the team of astronomers who and masses are known. And even better - one of mad ...
... Jupiter and nevertheless end up with a star that is This new set of observations thus almost triples the only slightly larger", suggests Claudio Melo from number of low-mass stars for which precise radii ESO and member of the team of astronomers who and masses are known. And even better - one of mad ...
d 2
... Earth = a grain of sand The Earth orbits the Sun at a distance of one meter Proxima Centauri lies 270 kilometers (170 miles) away Barnard’s Star lies 370 kilometers (230 miles) away Less than 100 stars lie within 1000 kilometers (600 miles) ...
... Earth = a grain of sand The Earth orbits the Sun at a distance of one meter Proxima Centauri lies 270 kilometers (170 miles) away Barnard’s Star lies 370 kilometers (230 miles) away Less than 100 stars lie within 1000 kilometers (600 miles) ...
How did sailors of centuries past find their way across the seas
... such as the North Star from the horizon. Because the height of Polaris above the horizon is equal to the latitude at a particular location, sailors could use the star to estimate their location. ...
... such as the North Star from the horizon. Because the height of Polaris above the horizon is equal to the latitude at a particular location, sailors could use the star to estimate their location. ...
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.