Week 9
... Kant and Laplace proposed the nebular hypothesis over two centuries ago A large amount of evidence now supports this idea…especially some Hubble images Older references will still discuss the planetesimal or close encounter theory. ...
... Kant and Laplace proposed the nebular hypothesis over two centuries ago A large amount of evidence now supports this idea…especially some Hubble images Older references will still discuss the planetesimal or close encounter theory. ...
Instructions - Chandra X
... EARTH SIZE. A grain of salt, with a dust-speck Moon one half inch away from it. SUN EARTH DISTANCE. 20 feet (or 5.5 meters) or 10 paces away. PLUTO’S ORBIT. 2.5 soccer fields away from the 2 inch Sun: NEAREST STAR TO Sun: 900 miles away (or 1500 kilometers). LIGHT TRAVEL TIME. It takes 8 minutes fo ...
... EARTH SIZE. A grain of salt, with a dust-speck Moon one half inch away from it. SUN EARTH DISTANCE. 20 feet (or 5.5 meters) or 10 paces away. PLUTO’S ORBIT. 2.5 soccer fields away from the 2 inch Sun: NEAREST STAR TO Sun: 900 miles away (or 1500 kilometers). LIGHT TRAVEL TIME. It takes 8 minutes fo ...
SIMPLE RADIATION TRANSFER FOR SPHERICAL STARS
... where Lr = 4πr2 F is stellar luminosity at a radius r, i.e. the total amount of radiation energy flowing across a spherical surface with a radius r, and Ur is the radiation energy density. The last equation looks just like the equation for heat diffusion, with the coefficient of thermal conductivity ...
... where Lr = 4πr2 F is stellar luminosity at a radius r, i.e. the total amount of radiation energy flowing across a spherical surface with a radius r, and Ur is the radiation energy density. The last equation looks just like the equation for heat diffusion, with the coefficient of thermal conductivity ...
Gravitational redshifts
... synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic stellar line asymmetries. This simulation from a CO5BOLD model predicts the behavior of an Fe I line ( 620 ...
... synthetic line profiles) are shorter than laboratory values due to convective blueshift. Curves before and after mid-transit (µ = 0.21, 0.59, 0.87) are not exact mirror images due to intrinsic stellar line asymmetries. This simulation from a CO5BOLD model predicts the behavior of an Fe I line ( 620 ...
Thermonuclear Reactions: The Beginning and the
... From mechanics and Newton's gravitational law one can calculate the velocity needed for a body, mx, to escape the gravitational pull of a larger mass, m, where mx n m. For example, if m is the earth's mass (5.94×1024 kg), a rocket (mass mx) must have a velocity of about 11 km/s to escape from the ea ...
... From mechanics and Newton's gravitational law one can calculate the velocity needed for a body, mx, to escape the gravitational pull of a larger mass, m, where mx n m. For example, if m is the earth's mass (5.94×1024 kg), a rocket (mass mx) must have a velocity of about 11 km/s to escape from the ea ...
Solar System Stroll - Madison Metropolitan School District
... often not encountered in other science lessons. Yet, the vast amounts of geologic time involved in the evolution of our planet and the astounding distances involved just within “our own” galaxy, are crucial prerequisites for understanding these subjects. “How big is space?,” is not only a perfectly ...
... often not encountered in other science lessons. Yet, the vast amounts of geologic time involved in the evolution of our planet and the astounding distances involved just within “our own” galaxy, are crucial prerequisites for understanding these subjects. “How big is space?,” is not only a perfectly ...
Neutron star - SharpSchool
... large stars, so they have much longer lives Small stars can live up to 200 billion years Medium stars (like the sun) can live for about ...
... large stars, so they have much longer lives Small stars can live up to 200 billion years Medium stars (like the sun) can live for about ...
Life Cycle of Stars
... temperature of a star determines its color – from cool, red stars to hot, blue ones. The Sun is a medium temperature yellow star. Around 1910, astronomers Ejnar Hertzsprung and Henry Russell independently developed what is now known as the Hertzsprung-Russell or H-R diagram. This graph plots the rel ...
... temperature of a star determines its color – from cool, red stars to hot, blue ones. The Sun is a medium temperature yellow star. Around 1910, astronomers Ejnar Hertzsprung and Henry Russell independently developed what is now known as the Hertzsprung-Russell or H-R diagram. This graph plots the rel ...
Life and Death of a Star
... 10 million K, it is hot enough for Fusion to start – The Hydrogen burning star is born and maintains a balance between gravity and pressure – This balance is known as gravitational equilibrium – This is now a main sequence star ...
... 10 million K, it is hot enough for Fusion to start – The Hydrogen burning star is born and maintains a balance between gravity and pressure – This balance is known as gravitational equilibrium – This is now a main sequence star ...
Data Tables - AlmaMiddleSchoolScience
... by Anne Cannon and plotted them to a graph sheet. Three quarters of a million stars were plotted to see if there were patterns. Four main groups were discovered: “Super Giants”, “Giants”, “Main Sequence” and “White Dwarfs”. Stars on the main sequence generate energy by converting (via fusion) hydrog ...
... by Anne Cannon and plotted them to a graph sheet. Three quarters of a million stars were plotted to see if there were patterns. Four main groups were discovered: “Super Giants”, “Giants”, “Main Sequence” and “White Dwarfs”. Stars on the main sequence generate energy by converting (via fusion) hydrog ...
AY2 - Overview of the Universe
... A) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light. B) An imaginary spaceship can go ...
... A) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light. B) An imaginary spaceship can go ...
CEA - Nuclear astrophysics
... stronomy deals with the position and observation of the objects in our Universe, from planets to galaxies. It is the oldest of the sciences. Astrophysics is the study of the physical properties of these objects. It dates from the start of the 20th century. Nuclear astrophysics is the marriage of nuc ...
... stronomy deals with the position and observation of the objects in our Universe, from planets to galaxies. It is the oldest of the sciences. Astrophysics is the study of the physical properties of these objects. It dates from the start of the 20th century. Nuclear astrophysics is the marriage of nuc ...
The Sun
... According to Wien’s Law, 2,900,000/Temp in Kelvin, the peak emission of the sun is 2,900,000/6000K. This is equal to 483 nm, the color of blue-green light. This is why our eyes have evolved to detect the visible spectrum. ...
... According to Wien’s Law, 2,900,000/Temp in Kelvin, the peak emission of the sun is 2,900,000/6000K. This is equal to 483 nm, the color of blue-green light. This is why our eyes have evolved to detect the visible spectrum. ...
PRESENTATION: Evolution of the elements through the lifecycles of
... -Picture striking a rubber ball on the ground with a hammer. It will compress, but eventually expand and throw off the hammer, if the blow (the solar mass) is not strong enough to compress it into a black hole. -The Iron atoms are compressed to the point that the electrons are collapsing into the pr ...
... -Picture striking a rubber ball on the ground with a hammer. It will compress, but eventually expand and throw off the hammer, if the blow (the solar mass) is not strong enough to compress it into a black hole. -The Iron atoms are compressed to the point that the electrons are collapsing into the pr ...
