Document
... • All stars arrived on the MS at about the same time. • The cluster is as old as the most luminous (massive) star left on the MS. • All MS stars to the left have already used up their H fuel and are gone. • The position of the hottest, brightest star on a cluster’s main sequence is called the main s ...
... • All stars arrived on the MS at about the same time. • The cluster is as old as the most luminous (massive) star left on the MS. • All MS stars to the left have already used up their H fuel and are gone. • The position of the hottest, brightest star on a cluster’s main sequence is called the main s ...
Search for Life in the Universe
... • Other life elsewhere – Of course, that’s what we are looking for – Ultimately all stars die and recycled ISM is lost ...
... • Other life elsewhere – Of course, that’s what we are looking for – Ultimately all stars die and recycled ISM is lost ...
charts_set_9
... - contains young and old stars, gas, dust. Has spiral structure - vertical thickness roughly 100 pc - 2 kpc (depending on component. Most gas and dust in thinner layer, most stars in thicker layer) ...
... - contains young and old stars, gas, dust. Has spiral structure - vertical thickness roughly 100 pc - 2 kpc (depending on component. Most gas and dust in thinner layer, most stars in thicker layer) ...
notes
... billion years or more to use up their nuclei fuel. Then their outer layer expand and they become red giants. Eventually the outer parts grow bigger and move out into space leaving the blue hot core of the star behind. This is called a white dwarf. ...
... billion years or more to use up their nuclei fuel. Then their outer layer expand and they become red giants. Eventually the outer parts grow bigger and move out into space leaving the blue hot core of the star behind. This is called a white dwarf. ...
Precession of the Equinox - Binary Research Institute
... as proposed by some*, then it is quite possible we would not know our sun has a companion star. And what about precession, could it be the result of our sun’s curved motion through space, which is what our sun would do if it were part of a binary system? This question raises the ire of all those who ...
... as proposed by some*, then it is quite possible we would not know our sun has a companion star. And what about precession, could it be the result of our sun’s curved motion through space, which is what our sun would do if it were part of a binary system? This question raises the ire of all those who ...
Week 11 Concept Summary
... (b) Parallax: Looking at how much a star moves due to the Earth orbiting the Sun, we get the distance geometrically. However, this requires us to already know how big 1 AU is, hence it builds on radar ranging. Parallax is only useful out to a few hundred parsecs; only the nearest stars. (c) Main Seq ...
... (b) Parallax: Looking at how much a star moves due to the Earth orbiting the Sun, we get the distance geometrically. However, this requires us to already know how big 1 AU is, hence it builds on radar ranging. Parallax is only useful out to a few hundred parsecs; only the nearest stars. (c) Main Seq ...
Introduction
... simultaneous thorium-argon lamp observation (see, e.g., Konacki et al. 2003c) and an Iodine absorption cell (see, e.g., Cumming, Marcy, & Butler 1999 and references therein). While the Iodine cell is placed into the path of the star signal, before entering the spectrograph (and thus reducing the sig ...
... simultaneous thorium-argon lamp observation (see, e.g., Konacki et al. 2003c) and an Iodine absorption cell (see, e.g., Cumming, Marcy, & Butler 1999 and references therein). While the Iodine cell is placed into the path of the star signal, before entering the spectrograph (and thus reducing the sig ...
featured in the Arizona Daily Star
... they can’t visit a star to extract a sample of it. But there are ways to get a piece of a star and study it in the laboratory. That’s what I do — I study pieces of ancient stardust. But instead of using a telescope, I use a microscope to look for stardust inside meteorites. Over their lifetimes, sta ...
... they can’t visit a star to extract a sample of it. But there are ways to get a piece of a star and study it in the laboratory. That’s what I do — I study pieces of ancient stardust. But instead of using a telescope, I use a microscope to look for stardust inside meteorites. Over their lifetimes, sta ...
1 History of Astronomy - Journigan-wiki
... model of the solar system and heavenly sphere was a refinement of previous models developed by Greek astronomers. Ptolemy’s major contribution, however, was that his model could so accurately explain the motions of heavenly bodies, it became the model for understanding the structure of the solar sys ...
... model of the solar system and heavenly sphere was a refinement of previous models developed by Greek astronomers. Ptolemy’s major contribution, however, was that his model could so accurately explain the motions of heavenly bodies, it became the model for understanding the structure of the solar sys ...
Advanced STARS - WordPress.com
... It is known as the red planet due to its appearance when seen from earth at night It is the only planet besides Earth that has seasons It has a rotational period nearly the same as earth Its orbit takes 687 days Mars has 2 moons It has the largest dust storms in the solar system It has ...
... It is known as the red planet due to its appearance when seen from earth at night It is the only planet besides Earth that has seasons It has a rotational period nearly the same as earth Its orbit takes 687 days Mars has 2 moons It has the largest dust storms in the solar system It has ...
Lecture22-ASTA01 - University of Toronto
... • Uranus orbits the Sun at an average of 19.2 AU, almost twice as far away as Saturn. • Once again, we see how greatly spaced the Jovian planets are compared to the inner Terrestrial planets, and that the next one is about 1.8-2 times further than its inner neighbour ...
... • Uranus orbits the Sun at an average of 19.2 AU, almost twice as far away as Saturn. • Once again, we see how greatly spaced the Jovian planets are compared to the inner Terrestrial planets, and that the next one is about 1.8-2 times further than its inner neighbour ...
Pluto Moons exhibit Orbital Angular Momentum Quantization per Mass
... assumes that after tens of millions of years that the orbiting body is at or near its QCM equilibrium orbital radius r and that the orbital eccentricity is low so that our nearly circular orbit approximation leading to these particular equations holds true. For the Pluto system, Hydra has the larges ...
... assumes that after tens of millions of years that the orbiting body is at or near its QCM equilibrium orbital radius r and that the orbital eccentricity is low so that our nearly circular orbit approximation leading to these particular equations holds true. For the Pluto system, Hydra has the larges ...
Physics Today November 2003- Article: The Growth of Astrophysi...
... sources of stellar energy. At the end of the 19th century, there was a crisis in attempts to understand what makes the Sun and the stars shine. It was clear that gravitational contraction and chemical energy were insufficient to have kept the Sun shining for a time anything like the apparent age of ...
... sources of stellar energy. At the end of the 19th century, there was a crisis in attempts to understand what makes the Sun and the stars shine. It was clear that gravitational contraction and chemical energy were insufficient to have kept the Sun shining for a time anything like the apparent age of ...
test - Scioly.org
... 8) Clue: A sneaky white dwarf stealing matter from its Red Giant companion. Exhibits a “bow shock” on its way to becoming a planetary nebula. 9) Clue: Youngest known supernovae remnant (observed). 10) Clue: A planetary nebula surrounding what may be the hottest known white dwarf remnant. Close by, a ...
... 8) Clue: A sneaky white dwarf stealing matter from its Red Giant companion. Exhibits a “bow shock” on its way to becoming a planetary nebula. 9) Clue: Youngest known supernovae remnant (observed). 10) Clue: A planetary nebula surrounding what may be the hottest known white dwarf remnant. Close by, a ...
Name
... 2. Why did Amaterasu hide herself in a cave? 3. What did the gods do to try and lure her out? 4. What did they do to finally get her all the way out? 5. Describe in your own words why they wanted her out of the cave… ...
... 2. Why did Amaterasu hide herself in a cave? 3. What did the gods do to try and lure her out? 4. What did they do to finally get her all the way out? 5. Describe in your own words why they wanted her out of the cave… ...
Article PDF - IOPscience
... Neptune and other hypothetical massive planetary embryos or of its temporary capture in a resonance with one of the other planets, although these scenarios have never been quantitatively simulated. In this section we investigate the effects that an eccentric Neptune would have on the formation of th ...
... Neptune and other hypothetical massive planetary embryos or of its temporary capture in a resonance with one of the other planets, although these scenarios have never been quantitatively simulated. In this section we investigate the effects that an eccentric Neptune would have on the formation of th ...
Habitability: Good, Bad and the Ugly
... Luminosity of the Sun • Definition of luminosity (watts/m2) • Sun’s luminosity has been changing: earlier in its evolution, luminosity was only 70% of what it is today (how could temperature be maintained over geological time) • Future for luminosity – Remember star sequence from lab and lecture – 2 ...
... Luminosity of the Sun • Definition of luminosity (watts/m2) • Sun’s luminosity has been changing: earlier in its evolution, luminosity was only 70% of what it is today (how could temperature be maintained over geological time) • Future for luminosity – Remember star sequence from lab and lecture – 2 ...
Arguments for the presence of a distant large undiscovered Solar
... this distance, although possible, is also extremely unlikely. The number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these co ...
... this distance, although possible, is also extremely unlikely. The number of cometary orbits of sufficient accuracy for the present analysis is small, only 13, but the probability of the cluster in Fig. 2 occurring by chance is less than 0.0006 (see the appendix). It is possible that some of these co ...
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.