The Milky Way The Milky Way`s Neighbourhood
... Hipparchus, an ancient Greek astronomer of the second century B.C.E., is best remembered for his astronomical measurements and the instruments he created to make them. Hipparchus constructed an atlas of the stars visible without a telescope and categorized them by brightness. The first major astrome ...
... Hipparchus, an ancient Greek astronomer of the second century B.C.E., is best remembered for his astronomical measurements and the instruments he created to make them. Hipparchus constructed an atlas of the stars visible without a telescope and categorized them by brightness. The first major astrome ...
How stars form slide show File
... available hydrogen has already been fused to form helium. For every 600 million tons of hydrogen fused to helium, 5 million tons are converted into energy and eventually released to space. At this rate, the sun will continue to burn ...
... available hydrogen has already been fused to form helium. For every 600 million tons of hydrogen fused to helium, 5 million tons are converted into energy and eventually released to space. At this rate, the sun will continue to burn ...
Lecture 16 - Purdue Physics
... • Incident light: the light striking the mirror. • Normal line: a line perpendicular to the surface of the mirror at the point where the light hits it. • Angle of incidence: angle between the incident beam and the normal line. • Angle of reflection: angle between the reflected beam and the normal li ...
... • Incident light: the light striking the mirror. • Normal line: a line perpendicular to the surface of the mirror at the point where the light hits it. • Angle of incidence: angle between the incident beam and the normal line. • Angle of reflection: angle between the reflected beam and the normal li ...
Answer Key 2
... 4. Carbon, nitrogen and oxygen are heavy elements, which accounts for their stable position in the core of the star. True/False lines 12-13 Some of the heavy elements, e.g. carbon, nitrogen and oxygen move into the star’s outer layers. 5. Investigation of the planetary nebulae has been made difficul ...
... 4. Carbon, nitrogen and oxygen are heavy elements, which accounts for their stable position in the core of the star. True/False lines 12-13 Some of the heavy elements, e.g. carbon, nitrogen and oxygen move into the star’s outer layers. 5. Investigation of the planetary nebulae has been made difficul ...
Bolte_LRIS_08A
... The Dwarf galaxy Abundances and Radial-velocities Team (DART) project using the ESO VLT/FLAMES facility measured abundances for a large number of giants in the dSph galaxies Sculptor, Fornax, Sextans and Carina. Their results show that while there are large dSph-to-dSph differences in the metallicit ...
... The Dwarf galaxy Abundances and Radial-velocities Team (DART) project using the ESO VLT/FLAMES facility measured abundances for a large number of giants in the dSph galaxies Sculptor, Fornax, Sextans and Carina. Their results show that while there are large dSph-to-dSph differences in the metallicit ...
Endpoints of Stellar Evolution
... In a massive star, core temperature can be high enough that nuclear burning of Si to Fe can occur. Beyond Fe, further fusion is endothermic, and will not occur under equilibrium conditions. As an iron core develops, other reactions still proceed at larger ...
... In a massive star, core temperature can be high enough that nuclear burning of Si to Fe can occur. Beyond Fe, further fusion is endothermic, and will not occur under equilibrium conditions. As an iron core develops, other reactions still proceed at larger ...
Main-sequence stage Stellar lifetimes
... convection in outer 0.2 R. • In high-mass stars, energy transport by convection in inner part, by radiation in outer part. The Galaxy ...
... convection in outer 0.2 R. • In high-mass stars, energy transport by convection in inner part, by radiation in outer part. The Galaxy ...
Light Years
... Distances in space are so large that it does not make sense to use a typical unit such as kilometers or miles. Instead, astronomers use a special unit called a light year to measure the distances between stars and galaxies. A light year is the distance that light travels in one year. Moving 300,000 ...
... Distances in space are so large that it does not make sense to use a typical unit such as kilometers or miles. Instead, astronomers use a special unit called a light year to measure the distances between stars and galaxies. A light year is the distance that light travels in one year. Moving 300,000 ...
mam.evolution
... • Only appears so bright because it is so close. • Absolute visual magnitude = 4.83 (magnitude if it were at a distance of 32.6 light years) • 109 times Earth’s diameter • 333,000 times Earth’s mass • Consists entirely of gas (av. density = 1.4 g/cm3) • Central temperature = 15 million K • Surface t ...
... • Only appears so bright because it is so close. • Absolute visual magnitude = 4.83 (magnitude if it were at a distance of 32.6 light years) • 109 times Earth’s diameter • 333,000 times Earth’s mass • Consists entirely of gas (av. density = 1.4 g/cm3) • Central temperature = 15 million K • Surface t ...
Astronomy 162 Lab 4: Stars
... groups: Giants and Super Giants at the top, a long line of Main Sequence stars in the middle, and White Dwarfs at the bottom. It turns out that Main Sequence stars are in the prime of their lives, those stars burning Hydrogen into Helium are found on the middle line. Giants and Super Giants are old ...
... groups: Giants and Super Giants at the top, a long line of Main Sequence stars in the middle, and White Dwarfs at the bottom. It turns out that Main Sequence stars are in the prime of their lives, those stars burning Hydrogen into Helium are found on the middle line. Giants and Super Giants are old ...
Methods of Determining Relative Age of Young Stellar Objects
... optical images might indicate relative age. As a star evolves, it will gradually emerge from its nebula of gas and dust. Early on in its development, it may show spectral anomalies that indicate mass inflows and outflows. P Cygni profiles indicate mass outflows, while inverse P Cygni profiles indica ...
... optical images might indicate relative age. As a star evolves, it will gradually emerge from its nebula of gas and dust. Early on in its development, it may show spectral anomalies that indicate mass inflows and outflows. P Cygni profiles indicate mass outflows, while inverse P Cygni profiles indica ...
Week 7 Notes Comets, Meteors, and Asteroids
... extends beyond __NEPTUNE’S__ orbit to about __100__ times Earth’s __DISTANCE__ to the sun. b. The __OORT CLOUD__ is a __SPHERICAL__ region that __SURROUNDS__ the Solar System about 1,000 time the distance between __PLUTO__ and the __SUN__ ...
... extends beyond __NEPTUNE’S__ orbit to about __100__ times Earth’s __DISTANCE__ to the sun. b. The __OORT CLOUD__ is a __SPHERICAL__ region that __SURROUNDS__ the Solar System about 1,000 time the distance between __PLUTO__ and the __SUN__ ...
Our Community`s Place Among the Stars
... four hydrogen atoms fuse together to make one helium atom in a star’s core Some mass is “lost” in the reaction, because one helium atom has less mass than four hydrogen ...
... four hydrogen atoms fuse together to make one helium atom in a star’s core Some mass is “lost” in the reaction, because one helium atom has less mass than four hydrogen ...
Spots on Ap Stars
... changes. From an observed line profile, one can construct an image of the surface of the star. This technique has been applied to many different types of stars. ...
... changes. From an observed line profile, one can construct an image of the surface of the star. This technique has been applied to many different types of stars. ...
Types of Telescopes - NSTA Learning Center
... Today, astronomers use digital detectors, such as CCDs (Charged-Coupled Devices): Solid-state semi-conductor chips that use the photoelectric effect. Photons knock electrons loose when they collide with certain elements. Loose electrons create a charge that we measure. ...
... Today, astronomers use digital detectors, such as CCDs (Charged-Coupled Devices): Solid-state semi-conductor chips that use the photoelectric effect. Photons knock electrons loose when they collide with certain elements. Loose electrons create a charge that we measure. ...
Astronomy Lecture Notes: Stellar Nomenclature I Introduction
... i. Only the brightest stars have formal names, but all stars have official designations. ii. Many formal names of stars are middle eastern in origin to honor the middle eastern astronomers that carried on work in astronomy after the fall of the Roman Empire. iii. Examples: See the names of stars in ...
... i. Only the brightest stars have formal names, but all stars have official designations. ii. Many formal names of stars are middle eastern in origin to honor the middle eastern astronomers that carried on work in astronomy after the fall of the Roman Empire. iii. Examples: See the names of stars in ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.