PPT
... White Dwarfs are supported by electron degeneracy pressure • in a low-mass star, Fusion stops after He -->C and O • Just cools off and fizzles out ...
... White Dwarfs are supported by electron degeneracy pressure • in a low-mass star, Fusion stops after He -->C and O • Just cools off and fizzles out ...
Young Stars
... 4H + 2e- He + 2 + energy •It burns at exactly the right rate to replace the energy lost •For the Sun, there is enough fuel in the central part to keep it burning steadily for 10 billion years •All stars are in a balance of pressure vs. gravity •To compensate for larger masses, they have to be big ...
... 4H + 2e- He + 2 + energy •It burns at exactly the right rate to replace the energy lost •For the Sun, there is enough fuel in the central part to keep it burning steadily for 10 billion years •All stars are in a balance of pressure vs. gravity •To compensate for larger masses, they have to be big ...
Solar System Lesson Organizer
... Domain Vocabulary: day, orbit, rotate, planet, solar system, star, sun, year, constellation, asteroid, comet, sunspot, satellite, crater, crescent, new moon, half moon, gibbous moon ...
... Domain Vocabulary: day, orbit, rotate, planet, solar system, star, sun, year, constellation, asteroid, comet, sunspot, satellite, crater, crescent, new moon, half moon, gibbous moon ...
Attitude Determination and Control
... M 3 for points above the equator R 2M 3 for points above the poles R M Earth' s magnetic moment 7.96 1015 tesla m 3 R orbit radius meters ...
... M 3 for points above the equator R 2M 3 for points above the poles R M Earth' s magnetic moment 7.96 1015 tesla m 3 R orbit radius meters ...
Collapse: Method 2
... Final adjustments. The thermodynamics now take on supreme importance. Much of what occurs is still theory: Stage 1. The density shields the core from external radiation, allowing the temperature to drop. Dust grains provide efficient cooling. The hydrogen is molecular. Stage 2. An isothermal collaps ...
... Final adjustments. The thermodynamics now take on supreme importance. Much of what occurs is still theory: Stage 1. The density shields the core from external radiation, allowing the temperature to drop. Dust grains provide efficient cooling. The hydrogen is molecular. Stage 2. An isothermal collaps ...
NJIT Physics 320: Astronomy and Astrophysics
... The Sun is at the center of all planetary motions, except for the Moon which orbits Earth. Under this arrangement the orbital speed of planets decreases steadily outwards, and the outer sphere of fixed stars is truly motionless. In Copernicus' original model the Earth has three motions: a daily 24-h ...
... The Sun is at the center of all planetary motions, except for the Moon which orbits Earth. Under this arrangement the orbital speed of planets decreases steadily outwards, and the outer sphere of fixed stars is truly motionless. In Copernicus' original model the Earth has three motions: a daily 24-h ...
Discovery of a candidate inner Oort cloud planetoid
... planet unlikely, but not impossible. Nonetheless, if such a planet does indeed exist – or did exist at one time – its signature will be unmistakable in the orbital parameters of all additional new objects detected in this region. All should have modest inclinations and perihelion similar to the 76AU ...
... planet unlikely, but not impossible. Nonetheless, if such a planet does indeed exist – or did exist at one time – its signature will be unmistakable in the orbital parameters of all additional new objects detected in this region. All should have modest inclinations and perihelion similar to the 76AU ...
Properties of Stars in general
... the region of the main sequence – During this period they are burning Hydrogen into Helium in their cores. – Their position in the main sequence is dependant on their mass (more massive at the upper left). – During their life they become somewhat hotter and move up to the left. – Our Sun is now ~ 20 ...
... the region of the main sequence – During this period they are burning Hydrogen into Helium in their cores. – Their position in the main sequence is dependant on their mass (more massive at the upper left). – During their life they become somewhat hotter and move up to the left. – Our Sun is now ~ 20 ...
Venus is a rocky planet very similar in size and surface gravity to
... Venus spins even more slowly than Mercury, but it spins backwards as compared to its orbit around the Sun. The slow, backwards spin makes the Venusian day 177 Earth days long. Astronomers don't know for sure why Venus spins the way it does. The leading theory is that when Venus was a newly formed “p ...
... Venus spins even more slowly than Mercury, but it spins backwards as compared to its orbit around the Sun. The slow, backwards spin makes the Venusian day 177 Earth days long. Astronomers don't know for sure why Venus spins the way it does. The leading theory is that when Venus was a newly formed “p ...
DTU_9e_ch09 - University of San Diego Home Pages
... The Hubble Space Telescope in 2005 revealed two small moons, each about 5000 times dimmer than Pluto. Named Nix and Hydra, they are between 2 and 3 times farther from Pluto than is its moon Charon. The lines radiating from Pluto and Charon are artifacts of the exposure. ...
... The Hubble Space Telescope in 2005 revealed two small moons, each about 5000 times dimmer than Pluto. Named Nix and Hydra, they are between 2 and 3 times farther from Pluto than is its moon Charon. The lines radiating from Pluto and Charon are artifacts of the exposure. ...
arXiv:0712.2297v1 [astro
... telescopes. Consequently, more than 66% of our target stars are fainter than V=8 mag. The observing scheme follows the standard practices implemented in precision radial velocity measurements with the iodine cell (Marcy & Butler 1992). The spectral data used for RV measurements are extracted from th ...
... telescopes. Consequently, more than 66% of our target stars are fainter than V=8 mag. The observing scheme follows the standard practices implemented in precision radial velocity measurements with the iodine cell (Marcy & Butler 1992). The spectral data used for RV measurements are extracted from th ...
The Milky Way – A Classic Galaxy
... schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular momentum, and so settled into a flat disk, and only gradually is forming itself into stars. • Globular clusters formed during the proto-galaxy stage and during the time they c ...
... schmushed it all together into what is now the central bulge. • Then, more slowly, gas fell in from farther out, had angular momentum, and so settled into a flat disk, and only gradually is forming itself into stars. • Globular clusters formed during the proto-galaxy stage and during the time they c ...
Structure of Mercury`s Interior
... craters, looking very much like the Earth's Moon. During its three passes by the planet, Mariner 10 took pictures of about half the surface of the planet, so we don't know what the rest of the surface looks like. Mercury's impact craters were made early in the evolution of the solar system, nearly 4 ...
... craters, looking very much like the Earth's Moon. During its three passes by the planet, Mariner 10 took pictures of about half the surface of the planet, so we don't know what the rest of the surface looks like. Mercury's impact craters were made early in the evolution of the solar system, nearly 4 ...
Chapter 13 - USM People Pages
... ||| Two spherical asteroids have the same radius R. Asteroid 1 has mass M and asteroid 2 has mass 2M. The two asteroids are released from rest with distance 10R between their centers. What is the speed of each asteroid just before they collide? Hint: You will need to use two conservation laws. ||| T ...
... ||| Two spherical asteroids have the same radius R. Asteroid 1 has mass M and asteroid 2 has mass 2M. The two asteroids are released from rest with distance 10R between their centers. What is the speed of each asteroid just before they collide? Hint: You will need to use two conservation laws. ||| T ...
We see apparent retrograde motion when we pass by a
... too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away Thus setting the stage for the long, historical ...
... too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away Thus setting the stage for the long, historical ...
ASTR 1010 Homework Solutions
... CCD images several weeks apart to see the motion. (d) The trans-Neptunian objects are extremely faint thus requiring a lot of light-gathering power to detect them. Also, their very small daily motions require high resolution observations, too. ...
... CCD images several weeks apart to see the motion. (d) The trans-Neptunian objects are extremely faint thus requiring a lot of light-gathering power to detect them. Also, their very small daily motions require high resolution observations, too. ...
Olivewood Gardens
... All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission is hereby granted to ...
... All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission is hereby granted to ...
ASTR 300 Stars and Stellar Systems Spring 2011
... 2. According to the modern model of a pulsar, if a neutron star formed with no magnetic field at all, could it be a pulsar? Why or why not? We do not think a neutron star could be a pulsar without a magnetic field. The radiation which defines the pulsar is thought to be produced by electron- positro ...
... 2. According to the modern model of a pulsar, if a neutron star formed with no magnetic field at all, could it be a pulsar? Why or why not? We do not think a neutron star could be a pulsar without a magnetic field. The radiation which defines the pulsar is thought to be produced by electron- positro ...
A time travel of 14 billion years
... • The cloud shrinks to form a star in its centre. • The rotation of the cloud produces a disk. • In the disk rocky planetesimals form near the star. • Ice made planetisimals in the outer parts. • Matter accumulates near these planetisimals while the solar wind sweeps the circumstant space. ...
... • The cloud shrinks to form a star in its centre. • The rotation of the cloud produces a disk. • In the disk rocky planetesimals form near the star. • Ice made planetisimals in the outer parts. • Matter accumulates near these planetisimals while the solar wind sweeps the circumstant space. ...
Jul - Wadhurst Astronomical Society
... Earth to the Sun. On this scale the distance to the Moon is 0.0025 AU, Saturn is 10 AU from the Sun, Uranus 20 AU and Neptune 30 AU. This is ok for the Solar System but greater than this we use the speed of light, 300,000 km per second as our measuring stick. The nearest star after the Sun is Proxim ...
... Earth to the Sun. On this scale the distance to the Moon is 0.0025 AU, Saturn is 10 AU from the Sun, Uranus 20 AU and Neptune 30 AU. This is ok for the Solar System but greater than this we use the speed of light, 300,000 km per second as our measuring stick. The nearest star after the Sun is Proxim ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.