Universe Discovery Guides: January
... beach ball would be about the size of Betelgeuse. Next time you are at the beach, pick up a grain of sand and compare it to your beach ball. Oxygen and silicon are the elements in that grain of sand and were made inside stars like Betelgeuse billions of years ago. If Betelgeuse were placed where the ...
... beach ball would be about the size of Betelgeuse. Next time you are at the beach, pick up a grain of sand and compare it to your beach ball. Oxygen and silicon are the elements in that grain of sand and were made inside stars like Betelgeuse billions of years ago. If Betelgeuse were placed where the ...
document
... “Tools”, not “Problems” • If we can determine that 2 stars are identical, then their relative brightness translates to relative distances • Example: Sun vs. Cen – spectra are very similar temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means ...
... “Tools”, not “Problems” • If we can determine that 2 stars are identical, then their relative brightness translates to relative distances • Example: Sun vs. Cen – spectra are very similar temperatures, radii almost identical (T follows from Planck function, radius R can be deduced by other means ...
Binaries
... Similarly we can calculate the Sun’s mass using Earth’s orbit. We need at least two object rotating around each other to calculate the mass of them. ...
... Similarly we can calculate the Sun’s mass using Earth’s orbit. We need at least two object rotating around each other to calculate the mass of them. ...
Atoms and Stars IST 3360 and IST 1990
... • All planets exhibited this sometimes • Plato’s theory had extra spheres and features to handle retrograde motion ...
... • All planets exhibited this sometimes • Plato’s theory had extra spheres and features to handle retrograde motion ...
Continuous Spectrum—Kirchoff`s First Law
... Our rough calculation was very crude. The best computer models predict the lifetimes shown in the table: Mass (solar masses) Lifetime (years) ...
... Our rough calculation was very crude. The best computer models predict the lifetimes shown in the table: Mass (solar masses) Lifetime (years) ...
interactive.hr.diagram
... H-R Diagram Internet Activity Go to the following website to answer the following questions: http://www.wwnorton.com/college/astronomy/astro21/demo/_animations/hr_diagram.swf To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal a ...
... H-R Diagram Internet Activity Go to the following website to answer the following questions: http://www.wwnorton.com/college/astronomy/astro21/demo/_animations/hr_diagram.swf To receive credit, you must answer in complete sentences! Don’t be afraid to think! 1) What is plotted along the horizontal a ...
Astronomy Triemester Review Sheet 2015
... 350 light years away. A. 2 light years C. 7 light years B. 25 light year D. 20,000 light years 3. The smallest size/distance ratio that John Glenn can see is 1/3300. This means that John can be no further away than 3,300 km from two objects, separated by 1km, and still see them as two distinct objec ...
... 350 light years away. A. 2 light years C. 7 light years B. 25 light year D. 20,000 light years 3. The smallest size/distance ratio that John Glenn can see is 1/3300. This means that John can be no further away than 3,300 km from two objects, separated by 1km, and still see them as two distinct objec ...
81 KB - CSIRO Publishing
... binding energy) within its own potential well. Matter that is unbound may include material stripped away by the action of a tidal encounter or ‘evaporated’ away if it exceeds the escape velocity of the system. If being gravitationally bound is a requirement to be a galaxy, then collections of ‘tidal ...
... binding energy) within its own potential well. Matter that is unbound may include material stripped away by the action of a tidal encounter or ‘evaporated’ away if it exceeds the escape velocity of the system. If being gravitationally bound is a requirement to be a galaxy, then collections of ‘tidal ...
CONSTELLATIONS
... Southern window of the plansiphere. Use the Altitude Ruler to measure the altitude of the sun (ecliptic) above the southern horizon. Repeat the process for the dates in the table below. ...
... Southern window of the plansiphere. Use the Altitude Ruler to measure the altitude of the sun (ecliptic) above the southern horizon. Repeat the process for the dates in the table below. ...
Chapter three: The properties of Stars
... inner surface of a sphere called celestial sphere and they seem to be at same distance from us. However this is just a projection effect. For the stars we can see with our unaided eyes, the nearest star (Alpha Centauri) is about 4.365 light years whilst the furthest (stars in Andromeda galaxy) is 2. ...
... inner surface of a sphere called celestial sphere and they seem to be at same distance from us. However this is just a projection effect. For the stars we can see with our unaided eyes, the nearest star (Alpha Centauri) is about 4.365 light years whilst the furthest (stars in Andromeda galaxy) is 2. ...
color magnitude diagrams - AST 114, Astronomy Lab II for Spring
... the light gets spread over a larger and larger sphere centered on the light. The surface area of a sphere is given by 4R2, where R is the radius of the sphere, or in the case of a light it’s the distance between you and the light bulb. So as you get further away from the light, the area of the sphe ...
... the light gets spread over a larger and larger sphere centered on the light. The surface area of a sphere is given by 4R2, where R is the radius of the sphere, or in the case of a light it’s the distance between you and the light bulb. So as you get further away from the light, the area of the sphe ...
Solutions to Homework #4, AST 203, Spring 2009
... This statement is true. Since globular clusters contain lots of old stars, and the endstate of low-mass stars are white dwarfs, one would expect globular clusters to have lots of them. c) If a 3.5 M main-sequence star is orbiting a 2.5 M red giant, the red giant must have been more massive than 3M ...
... This statement is true. Since globular clusters contain lots of old stars, and the endstate of low-mass stars are white dwarfs, one would expect globular clusters to have lots of them. c) If a 3.5 M main-sequence star is orbiting a 2.5 M red giant, the red giant must have been more massive than 3M ...
New Suns in the Cosmos?
... upsurge along the past 15 years, with the discovery of many extra-solar planetary systems, demonstrating that the Sun is not unique as a planet host star. In this context, the main question now is the extent to which the properties of the Sun and its planetary system can be considered as representat ...
... upsurge along the past 15 years, with the discovery of many extra-solar planetary systems, demonstrating that the Sun is not unique as a planet host star. In this context, the main question now is the extent to which the properties of the Sun and its planetary system can be considered as representat ...
Grzegorz Nowak, Andrzej Niedzielski, Aleksander Wolszczan, Pawe
... The main objective of the PTPS is detection of planets around GK subgiants and giants through precision radial velocity (RV) measurements with iodine absorption cell using HET HRS spectrograph. However, the long period RV variations of red giants may also have other than planetary nature (e.g. a non ...
... The main objective of the PTPS is detection of planets around GK subgiants and giants through precision radial velocity (RV) measurements with iodine absorption cell using HET HRS spectrograph. However, the long period RV variations of red giants may also have other than planetary nature (e.g. a non ...
4 Distances in Astronomy
... reliably. The best ground-based telescopes can achieve a resolution of about 0:500 , which can sometimes be reduced to about 0:0100 by averaging over many measurements. This corresponds to a distance of about 300 ly. Spacebased telescopes can do better (see the discussion of Hipparcos below), but so ...
... reliably. The best ground-based telescopes can achieve a resolution of about 0:500 , which can sometimes be reduced to about 0:0100 by averaging over many measurements. This corresponds to a distance of about 300 ly. Spacebased telescopes can do better (see the discussion of Hipparcos below), but so ...
PoS(EVN 2014)058 - Proceeding of science
... Cygnus X region. Cyg OB2 is therefore ideally studied at radio wavelengths which are unaffected by the large and non-uniform visual extinction (ranging from 4 to 10 mag [1]). This association is known to contain a rich population of massive stars [2] including ∼ 120 ± 20 O-type stars and 2600 ± 400 ...
... Cygnus X region. Cyg OB2 is therefore ideally studied at radio wavelengths which are unaffected by the large and non-uniform visual extinction (ranging from 4 to 10 mag [1]). This association is known to contain a rich population of massive stars [2] including ∼ 120 ± 20 O-type stars and 2600 ± 400 ...
Today in Astronomy 142: observations of stars
... fields. Observations from ground-based, balloon-borne, and satellite instruments show the CMB to agree with a blackbody spectrum (dotted line) across 3 decades of frequency and 4 orders of magnitude in intensity. This agreement with a blackbody spectrum indicates that the early universe was once in ...
... fields. Observations from ground-based, balloon-borne, and satellite instruments show the CMB to agree with a blackbody spectrum (dotted line) across 3 decades of frequency and 4 orders of magnitude in intensity. This agreement with a blackbody spectrum indicates that the early universe was once in ...
Document
... When it is summer, the Sun is giving off more energy and when it is winter the Sun is giving off less energy. ...
... When it is summer, the Sun is giving off more energy and when it is winter the Sun is giving off less energy. ...
Review: How does a star`s mass determine its life story?
... Earth’s surface if you could shrink it to < 1 cm ...
... Earth’s surface if you could shrink it to < 1 cm ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.