Powerpoint of lecture 1
... Relationships between observed properties Outline of the life history of a star ...
... Relationships between observed properties Outline of the life history of a star ...
Star Formation
... Stars of Other Masses • The time required for an interstellar cloud to become a main sequence star depends strongly on its mass • The most massive O stars reach the 10 million Kelvin needed to start fusion in a million years (1/50 time taken by sun) • An M-type star less massive than our sun takes ...
... Stars of Other Masses • The time required for an interstellar cloud to become a main sequence star depends strongly on its mass • The most massive O stars reach the 10 million Kelvin needed to start fusion in a million years (1/50 time taken by sun) • An M-type star less massive than our sun takes ...
ASTR 200 : Lecture 15 Ensemble Properties of Stars
... Most stars will leave the main sequence and evolve to become giants for a while ● Driven by changes in energy production in core ...
... Most stars will leave the main sequence and evolve to become giants for a while ● Driven by changes in energy production in core ...
Extragalactic AO Science
... Most gravitational lenses occur in areas under a couple of arcseconds, and weakly lensed galaxies are elongated by of order an arcsecond. Even for extended sources, AO on Keck provides increased sensitivity. Especially powerful in identifying point-like sources within galaxy. Crowding of stars in ne ...
... Most gravitational lenses occur in areas under a couple of arcseconds, and weakly lensed galaxies are elongated by of order an arcsecond. Even for extended sources, AO on Keck provides increased sensitivity. Especially powerful in identifying point-like sources within galaxy. Crowding of stars in ne ...
Spectroscopy, the Doppler Shift and Masses of Binary Stars
... those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
... those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
What MSU Astronomers Will Do with the SOAR
... • Will measure Supernovae at still greater distances • Are they really “standard candles”? • Dimming by dust? • Luminosity evolution with lookback time? • Relationship between density and pressure of Dark Energy • Usual assumption: Einstein’s cosmological constant • But we don’t know… • Measuring th ...
... • Will measure Supernovae at still greater distances • Are they really “standard candles”? • Dimming by dust? • Luminosity evolution with lookback time? • Relationship between density and pressure of Dark Energy • Usual assumption: Einstein’s cosmological constant • But we don’t know… • Measuring th ...
Lecture 12
... • How do we measure stellar luminosities? • How do we measure stellar temperatures? • How do we measure stellar masses? ...
... • How do we measure stellar luminosities? • How do we measure stellar temperatures? • How do we measure stellar masses? ...
UNIT VIII/B: THE EARTH IN SPACE – STARS AND GALAXIES
... “bulge”). c. There are three distinct spiral arms of stars. d. The Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 light-years. e. Scientists suspect that a super massive black hole– an immensely dense area of space that suck ...
... “bulge”). c. There are three distinct spiral arms of stars. d. The Sun is positioned in one of these arms about two-thirds of the way from the galactic center, at a distance of about 30,000 light-years. e. Scientists suspect that a super massive black hole– an immensely dense area of space that suck ...
Our Community`s Place Among the Stars
... a star that forms after much of the helium is used up, causing the star’s core to contract even more, and its outer layers escape into space ...
... a star that forms after much of the helium is used up, causing the star’s core to contract even more, and its outer layers escape into space ...
star signs - Museum of the Rockies
... Because all stars appear to rotate around the North Celestial Pole, the stars between the pole and the observer’s horizon are known as “circumpolar constellations” because they never rise or set. ACTIVITY: This activity relates to coordinate systems and graphing and has a direct relationship to the ...
... Because all stars appear to rotate around the North Celestial Pole, the stars between the pole and the observer’s horizon are known as “circumpolar constellations” because they never rise or set. ACTIVITY: This activity relates to coordinate systems and graphing and has a direct relationship to the ...
3 - MrFuglestad
... White Dwarf – Earth sized star that is stable with no nuclear reactions and is made of helium or carbon depending on the mass. Less massive than our Sun = Helium. There can be other elements present such as Oxygen, etc. Often the White Dwarf stars are surrounded by nebula. Black Dwarf – This star is ...
... White Dwarf – Earth sized star that is stable with no nuclear reactions and is made of helium or carbon depending on the mass. Less massive than our Sun = Helium. There can be other elements present such as Oxygen, etc. Often the White Dwarf stars are surrounded by nebula. Black Dwarf – This star is ...
The Evolution of Stars - hrsbstaff.ednet.ns.ca
... keeps us safely planted here on Earth, but it is more that just that. Gravity, or gravitation, is the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
... keeps us safely planted here on Earth, but it is more that just that. Gravity, or gravitation, is the natural phenomenon by which all objects with mass attract other objects. Without gravity the universe would be a very different place. ...
The measure of Cosmological distances
... Velocity = Distance × H0 H0 = Hubble’s constant = 70 (km/s) / Mpc Edwin Hubble (1889 - 1953): II. 1929 - Discovery of distance - velocity relation in galaxies ...
... Velocity = Distance × H0 H0 = Hubble’s constant = 70 (km/s) / Mpc Edwin Hubble (1889 - 1953): II. 1929 - Discovery of distance - velocity relation in galaxies ...
Star Formation 1/18/2015
... OB Stars are the most influential Characteristics? _______! Type of light? _______ So? _______ light ionizes Hydrogen Produces large cloud of hot glowing gas - _____________ ...
... OB Stars are the most influential Characteristics? _______! Type of light? _______ So? _______ light ionizes Hydrogen Produces large cloud of hot glowing gas - _____________ ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.