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RTFS Test - 2017 BCS Cobra
RTFS Test - 2017 BCS Cobra

... B: Expand the abbreviation 3. A: What is an Astronomical Unit (AU)? B: How many light minutes in an AU? 4. What is the approximate value of 1 AU in miles? 5. How many AUs in a lightyear? ...
Geol. 655 Isotope Geochemistry
Geol. 655 Isotope Geochemistry

... Which of these reactions dominates depends on temperature. The net result of all three reactions is the production of 4He and the consumption of H as well as Li and B. All main sequence stars produce He, yet over the history of the cosmos, this has had little impact on the H/He ratio of the universe ...
The Sun and the Stars
The Sun and the Stars

McDonald Observatory Planet Search - tls
McDonald Observatory Planet Search - tls

ISA_lecture01 - School of Physics
ISA_lecture01 - School of Physics

... A “planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. A “dwarf planet” is a celestial bo ...
THE HERTZSPRUNG-RUSSELL DIAGRAM
THE HERTZSPRUNG-RUSSELL DIAGRAM

Life in the galactic danger zone
Life in the galactic danger zone

... the positioning of the habitable zone would become immediately obvious; parked between the orbits of a sweltering hot Venus and chilly Mars. However, if we were to take an even bigger step back from our Solar System to a point that gave us a bird’s eye view of our Galaxy, identifying the best region ...
Colour-magnitude diagram of an open cluster
Colour-magnitude diagram of an open cluster

... Hertzsprung-Russell diagram, which is a plot of luminosity versus temperature. In this project you will produce a colour-magnitude diagram (hereafter CMD) for an open star cluster. Open star clusters are groups of stars that were born at the same time from a single gas cloud. All stars in a cluster ...
Star Formation in the Local Milky Way
Star Formation in the Local Milky Way

PDF file - Memorie della SAIt
PDF file - Memorie della SAIt

... are commonly observed in the galactic halo. At variance with the C(N) stars commonly observed in the galactic disk, the halo C-rich stars are usually also N-rich. They are dwarfs or giants, but not AGBs. Their composition is probably due to a mass transfer process from an AGB companion. Many of thes ...
Basics – II. Time, Magnitudes and Spectral types
Basics – II. Time, Magnitudes and Spectral types

... (along the celestial equator) we see a varying rate due to the projection of the ecliptic on to the celestial equator. This introduces a variation from uniform motion which is a wave of period half a year. The combination of these two effects leads to the Equation of Time (see figures). In effect, w ...
The Milky Way and other Galaxies
The Milky Way and other Galaxies

... can use Newtonian Gravity to determine the ...
Physics- HSC- Module 9.7 Astrophysics
Physics- HSC- Module 9.7 Astrophysics

... During the late 19th and early 20th centuries, astronomers obtained spectra and parallax distances for many stars, a powerful tool was discovered for classifying and understanding stars. Around 1911-13, Enjar Hertzsprung and Henry Norris Russell independently found that stars could be divided into t ...
Local group
Local group

... which live 'forever', • massive stars inject into ISM a mass pDMtotal of heavy elements (p depends on the IMF and the yield of SN- normalized to total mass of stars). • Assumptions: galaxies gas is well mixed, no infall or outflow, high mass stars return metals to ISM faster than time to form new st ...
Assignment 8 - utoledo.edu
Assignment 8 - utoledo.edu

... c. because all such stars explode before they can make any other elements d. because all such elements become radioactive and their nuclei break apart rather quickly e. because the cores of such stars get too hot for further types of fusion to be able to happen ____ 18. Many names used by astronomer ...
Lecture 18
Lecture 18

... ASTR 3730: Fall 2003 ...
Geography
Geography

... Pedro. “The 10 Brightest Stars.” Space.com. 26 Aug. 2008. ...
Chemical Evolution
Chemical Evolution

EvoluGon of high mass stars Solar-‐type stars end their lives by
EvoluGon of high mass stars Solar-‐type stars end their lives by

... star,  the  inner  core  leh  behind  either  forms   a  neutron  star  or  a  black  hole.     ...
Chapter 6: Stellar Evolution (part 2)
Chapter 6: Stellar Evolution (part 2)

... Mass loss plays an essential role in regulating the evolution of very massive stars. I ...
REACH FOR THE STARS MLK 2009
REACH FOR THE STARS MLK 2009

... star? _____________________________________________ How many AU does light travel in one year? _____________ What are Hayashi tracks? ______________________________________________________________ What causes a sun like star to suddenly contract in diameter? ___________________________________ How m ...
STAR MAKER Olaf Stapledon
STAR MAKER Olaf Stapledon

A Stars
A Stars

... Rigel: B8 Ia (B8 Bright Supergiant star) Sirius: A1v (A1 Main-Sequence star) Aldebaran: K5 III (K5 Giant star) ...
spectral lines as distant measurement tools
spectral lines as distant measurement tools

... Stars to the right have red appearance, to the left they are blue. The stellar brightness is measured as “photographic magnitude”, an inverted logarithmic scale for the amount of light received from different stars if they were all placed at the same distance. The diagram is not filled randomly, but ...
observing cards - NC Science Festival
observing cards - NC Science Festival

... The narratives give you - the sky guide stories to inspire the public at the telescope and beyond. Share the pictures with visitors to illustrate points. • Prepare yourself: Think about what you might be observing tonight. Pick one of the anecdotes to try. • Prepare your visitor: While the eyepiec ...
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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.
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