Stars
... radius is roughly proportional to the mass. But more massive white dwarfs are smaller! This is because more massive white dwarfs have more gravitational energy available and so can push the electrons to higher velocities before degeneracy sets in. But according to special relativity, nothing can go ...
... radius is roughly proportional to the mass. But more massive white dwarfs are smaller! This is because more massive white dwarfs have more gravitational energy available and so can push the electrons to higher velocities before degeneracy sets in. But according to special relativity, nothing can go ...
Introduction to Astronomy
... of 4 x 1026 J/s, this fuel would last 1011 seconds, or about 3000 years. Not long enough! ...
... of 4 x 1026 J/s, this fuel would last 1011 seconds, or about 3000 years. Not long enough! ...
Cosmic Hierarchy 9.5, 9.6
... 1) How did the solar system form? The solar nebula theory says that the Sun and planets formed from a swirling cloud of gas and dust that was pulled together by gravity. a) As the cloud becomes smaller the material will orbit A) faster B) slower C) in random directions b) Almost all of the material ...
... 1) How did the solar system form? The solar nebula theory says that the Sun and planets formed from a swirling cloud of gas and dust that was pulled together by gravity. a) As the cloud becomes smaller the material will orbit A) faster B) slower C) in random directions b) Almost all of the material ...
Milky Way Galaxy
... •Galaxy: large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. The Milky Way measures about 100,000 light-years across, and is thought to contain 200 billion stars. •Universe: the totality of known or supposed objects and phenomena ...
... •Galaxy: large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. The Milky Way measures about 100,000 light-years across, and is thought to contain 200 billion stars. •Universe: the totality of known or supposed objects and phenomena ...
STELLAR ATMOSPHERES
... • Understand stars from spectra formed in outer 1000 km of radius • Use laws of physics to develop a layer by layer description of T temperature P pressure and n density that leads to spectra consistent with observations ...
... • Understand stars from spectra formed in outer 1000 km of radius • Use laws of physics to develop a layer by layer description of T temperature P pressure and n density that leads to spectra consistent with observations ...
WIRO: Spectral Analysis P1
... consideration for infrared astronomy since moisture strongly absorbs infrared radiation, (2) comparatively low turbulence in the air above the mountain, (3) a dark night sky, (4) close proximity to the University of Wyoming, and (5) pre-existing road, electricity and phone lines since Jelm was forme ...
... consideration for infrared astronomy since moisture strongly absorbs infrared radiation, (2) comparatively low turbulence in the air above the mountain, (3) a dark night sky, (4) close proximity to the University of Wyoming, and (5) pre-existing road, electricity and phone lines since Jelm was forme ...
Where a limit?
... Life in the Universe can have the forms not similar to the terrestrial. Life occurrence in the interstellar environment where various organic molecules (оксида carbon, methyl spirit, formaldehyde are revealed many) is possible. In a space matter can be formed and more difficult molecules. Probably t ...
... Life in the Universe can have the forms not similar to the terrestrial. Life occurrence in the interstellar environment where various organic molecules (оксида carbon, methyl spirit, formaldehyde are revealed many) is possible. In a space matter can be formed and more difficult molecules. Probably t ...
Supernovae
... Neutrinos carry energy out of the star and provide momentum through collisions to throw off material. Or they heat the material so that it expands. They have no mass (like photons) and can traverse large depths without being absorbed. ...
... Neutrinos carry energy out of the star and provide momentum through collisions to throw off material. Or they heat the material so that it expands. They have no mass (like photons) and can traverse large depths without being absorbed. ...
The Milky Way - Chandra X
... Surrounding the thick Galactic disk is an extremely faint halo that contains the oldest stars in the Galaxy. These stars are located in globular clusters, dense swarms of about 100,000 stars. The Galactic halo is dominated by dark matter, a still mysterious form of matter that cannot be seen with an ...
... Surrounding the thick Galactic disk is an extremely faint halo that contains the oldest stars in the Galaxy. These stars are located in globular clusters, dense swarms of about 100,000 stars. The Galactic halo is dominated by dark matter, a still mysterious form of matter that cannot be seen with an ...
B - Department of Physics and Astronomy
... C. *the loss of rotational energy through the emission of beams of charges particles D. friction between the stellar surface and the surrounding nebular material. 23. How does the diameter of a black hole (size of the event horizon) depend on the mass inside the black hole? A. the greater the mass, ...
... C. *the loss of rotational energy through the emission of beams of charges particles D. friction between the stellar surface and the surrounding nebular material. 23. How does the diameter of a black hole (size of the event horizon) depend on the mass inside the black hole? A. the greater the mass, ...
Our place in the Universe
... Energy. • As the universe expanded, it cooled. This allowed the first subatomic particles to form (protons, neutron, electrons). • The simplest elements were the first to form. Hydrogen and helium. The fuel for STARS! ...
... Energy. • As the universe expanded, it cooled. This allowed the first subatomic particles to form (protons, neutron, electrons). • The simplest elements were the first to form. Hydrogen and helium. The fuel for STARS! ...
HR DIAGRAM ACTIVITY
... 1. Draw a circle around all the red giants on your graph and label this enclosed area Red Giants. 2. Draw a circle around all the white dwarfs and label this enclosed area White Dwarfs. 3. The majority of stars belong to the main sequence group. Draw an ellipse enclosing the points representing main ...
... 1. Draw a circle around all the red giants on your graph and label this enclosed area Red Giants. 2. Draw a circle around all the white dwarfs and label this enclosed area White Dwarfs. 3. The majority of stars belong to the main sequence group. Draw an ellipse enclosing the points representing main ...
Lectures 12 & 13 powerpoint (stellar death)
... Q: The Helium core contracts and heats the star enough to induce a hydrogen-burning shell… so what stops the helium core from contracting to zero radius (keep in mind that He fusion has not set in yet….)? A: Degeneracy pressure! The core becomes very dense… and two laws of quantum mechanics becom ...
... Q: The Helium core contracts and heats the star enough to induce a hydrogen-burning shell… so what stops the helium core from contracting to zero radius (keep in mind that He fusion has not set in yet….)? A: Degeneracy pressure! The core becomes very dense… and two laws of quantum mechanics becom ...
Chemical Evolution of the Galaxy and its satellites
... The clock for the explosion • Single-Degenerate model: the clock to the explosion is given by the lifetime of the secondary star, m2. The minimum time for the appearence of the first Type Ia SN is 30-35 Myr (the lifetime of a 8 Msun star) • Double-Degenerate model: the clock is given by the lifetim ...
... The clock for the explosion • Single-Degenerate model: the clock to the explosion is given by the lifetime of the secondary star, m2. The minimum time for the appearence of the first Type Ia SN is 30-35 Myr (the lifetime of a 8 Msun star) • Double-Degenerate model: the clock is given by the lifetim ...
Space Science Unit
... of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). They make up 90% of the stars in our sky. These stars are the diagonal strip running through ...
... of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). They make up 90% of the stars in our sky. These stars are the diagonal strip running through ...
Stars and their Properties
... Proper Motion is the measurement of a star’s physical motion Must be measured in parallel with Parallax o The Moving Cluster Method – Stars converge to a central point if you are moving backwards in space at very high speed – Used to 1,000 parsecs Sun is not in a star cluster Convergent Poin ...
... Proper Motion is the measurement of a star’s physical motion Must be measured in parallel with Parallax o The Moving Cluster Method – Stars converge to a central point if you are moving backwards in space at very high speed – Used to 1,000 parsecs Sun is not in a star cluster Convergent Poin ...
Stellar Evolution: The Lives of Stars
... “die” various deaths based on their mass. It is the crushing force of gravity on such great mass that “sparks” the process of nuclear fusion. Stars lead short lives if they are massive and long lives if not. Their “deaths” also depend on their original mass. Recall that nuclear fusion is an outward ...
... “die” various deaths based on their mass. It is the crushing force of gravity on such great mass that “sparks” the process of nuclear fusion. Stars lead short lives if they are massive and long lives if not. Their “deaths” also depend on their original mass. Recall that nuclear fusion is an outward ...
Position in Solar System ppt
... Bang Theory. The theory states that the universe originated sometime between 10 billion and 20 billion years ago from an enormous explosion of a small volume of matter at extremely high density and temperature. ...
... Bang Theory. The theory states that the universe originated sometime between 10 billion and 20 billion years ago from an enormous explosion of a small volume of matter at extremely high density and temperature. ...
Document
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
Stars
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
... Mizar, 88 light years distant, is the middle star in the handle of the Big Dipper. It was the first binary star system to be imaged with a telescope. Spectroscopic observations show periodic Doppler shifts in the spectra of Mizar A and B, indicating that they are each binary stars. But they were too ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.