Stellar evolution, I
... Stable stars are balanced. If nuclear reactions made too much energy, the extra energy would cause the star to expand. The expansion would lower the central temperature and density and slow the nuclear reactions. If the nuclear reactions made too little energy, the star would contract, increasing t ...
... Stable stars are balanced. If nuclear reactions made too much energy, the extra energy would cause the star to expand. The expansion would lower the central temperature and density and slow the nuclear reactions. If the nuclear reactions made too little energy, the star would contract, increasing t ...
Friday, Oct. 17
... Once they are hot enough inside (about 107 K) fusion can replace the energy they are losing. They are then in a stable thermal equilibrium; if fusion slowed down, they would contract and heat up causing fusion to speed back up until it balances the energy they are losing. Because of this stable equi ...
... Once they are hot enough inside (about 107 K) fusion can replace the energy they are losing. They are then in a stable thermal equilibrium; if fusion slowed down, they would contract and heat up causing fusion to speed back up until it balances the energy they are losing. Because of this stable equi ...
Prospecting for Planets – Radial Velocity Searches
... The first planet orbiting a star other than our Sun (or 'exoplanet') was discovered in 1992, orbiting an odd type of star known as a pulsar. It wasn't until three years later that the next exoplanet was discovered, this time around a star similar to our Sun. Since then the number of exoplanets we ha ...
... The first planet orbiting a star other than our Sun (or 'exoplanet') was discovered in 1992, orbiting an odd type of star known as a pulsar. It wasn't until three years later that the next exoplanet was discovered, this time around a star similar to our Sun. Since then the number of exoplanets we ha ...
The Dwarf Planets
... While we can't see most of the objects in the Kuiper belt well enough to determine whether they are round or not, we can estimate how big an object has to be before it becomes round and therefore how many objects in the Kuiper belt are likely round. In the asteroid belt Ceres, with a diameter of 900 ...
... While we can't see most of the objects in the Kuiper belt well enough to determine whether they are round or not, we can estimate how big an object has to be before it becomes round and therefore how many objects in the Kuiper belt are likely round. In the asteroid belt Ceres, with a diameter of 900 ...
Astronomy - Ocee PTA
... (gas; we call these Jovian or gas giants). The smaller planets are made of mostly what? (rock; we call these terrestrial or rock planets). What is Pluto now classified as? (a dwarf planet) Which planets have rings of rocks and gas that circle them? (all gas giants) Segment 1: Phases of the Moo ...
... (gas; we call these Jovian or gas giants). The smaller planets are made of mostly what? (rock; we call these terrestrial or rock planets). What is Pluto now classified as? (a dwarf planet) Which planets have rings of rocks and gas that circle them? (all gas giants) Segment 1: Phases of the Moo ...
Our solar system
... Summary of Chapter 4, cont. • Four inner planets – terrestrial planets – are rocky, small, and dense. • Four outer planets – Jovian planets – are gaseous and large. • Nebular theory of solar system formation: Cloud of gas and dust gradually collapsed under its own gravity, spinning faster as it shr ...
... Summary of Chapter 4, cont. • Four inner planets – terrestrial planets – are rocky, small, and dense. • Four outer planets – Jovian planets – are gaseous and large. • Nebular theory of solar system formation: Cloud of gas and dust gradually collapsed under its own gravity, spinning faster as it shr ...
Newton
... •How does the acceleration of gravity depend on the mass of a falling object? •It does not. All falling objects fall with the same acceleration (on a particular planet). •Now see why… •F = ma and on Earth acceleration due to gravity denoted “g” so F=mg or g=F/m •If mass of earth is ME then Fg=GMEm/ ...
... •How does the acceleration of gravity depend on the mass of a falling object? •It does not. All falling objects fall with the same acceleration (on a particular planet). •Now see why… •F = ma and on Earth acceleration due to gravity denoted “g” so F=mg or g=F/m •If mass of earth is ME then Fg=GMEm/ ...
Frostburg State Planetarium presents
... • Even the nearest planets appear as * (points) as we see them with our eyes; for even these objects far away Venus at closest 100x farther than our moon • To tell a planet from a star, all night stars twinkle and planets usually shine steady. • Also satellites (especially Space Station) shine stead ...
... • Even the nearest planets appear as * (points) as we see them with our eyes; for even these objects far away Venus at closest 100x farther than our moon • To tell a planet from a star, all night stars twinkle and planets usually shine steady. • Also satellites (especially Space Station) shine stead ...
May 2013 - Joliet Junior College
... The stars of late spring and early summer are now in the evening sky and we’ve lost Orion and the winter constellations until next year - unless you want to go stargazing in the middle of the night. High In the mid-evening sky is the easiest group of stars to find the stars of the Big Dipper. The Bi ...
... The stars of late spring and early summer are now in the evening sky and we’ve lost Orion and the winter constellations until next year - unless you want to go stargazing in the middle of the night. High In the mid-evening sky is the easiest group of stars to find the stars of the Big Dipper. The Bi ...
The Universe Starring Man? The Impact of Scientific
... Not only do we occupy an insignificant part of the universe Not only have we been around for an entirely insignificant amount of time [Universe began 13.8 billion years ago Earth came into existence 4.6 billion years ago First life 3.8 billion years ago Homo sapiens emerged only 200thousand years ag ...
... Not only do we occupy an insignificant part of the universe Not only have we been around for an entirely insignificant amount of time [Universe began 13.8 billion years ago Earth came into existence 4.6 billion years ago First life 3.8 billion years ago Homo sapiens emerged only 200thousand years ag ...
FREE Sample Here
... each chapter of Geosystems and the Geosystems Student Study Guide. The student is told: “after reading the chapter you should be able to”: • Distinguish among galaxies, stars, and planets, and locate Earth. • Overview the origin, formation, and development of Earth and the atmosphere and construct E ...
... each chapter of Geosystems and the Geosystems Student Study Guide. The student is told: “after reading the chapter you should be able to”: • Distinguish among galaxies, stars, and planets, and locate Earth. • Overview the origin, formation, and development of Earth and the atmosphere and construct E ...
The Sun - GeoScience
... 14. Diagram and label the positions of the Sun, Earth, and Moon during a Solar Eclipse. 15. When does a Total Solar Eclipse occur during the Moon’s phase cycle? Click on “Recent and Future Eclipses” under Related Links 16. What is the date of the next Eclipse that will be able to be seen from the W ...
... 14. Diagram and label the positions of the Sun, Earth, and Moon during a Solar Eclipse. 15. When does a Total Solar Eclipse occur during the Moon’s phase cycle? Click on “Recent and Future Eclipses” under Related Links 16. What is the date of the next Eclipse that will be able to be seen from the W ...
Orbit 13 Yes those famous words, “Class, we have a problem.” once
... & M. to do the actual orbits calculation and some preliminary graphics. Mr Howbackward (on flimsy Hollywood grounds) has chosen to ignore perhaps the greatest scientific discovery of all time and to have all the orbits based on perfect circles rather than the ellipses that Kepler discovered. Run tel ...
... & M. to do the actual orbits calculation and some preliminary graphics. Mr Howbackward (on flimsy Hollywood grounds) has chosen to ignore perhaps the greatest scientific discovery of all time and to have all the orbits based on perfect circles rather than the ellipses that Kepler discovered. Run tel ...
S-5-6-3_Pluto Graphic Organizer Why Isn`t Pluto a Planet
... Why Isn’t Pluto a Planet? Pluto was called a planet from its discovery in 1930 until it was re-classified as a "dwarf planet" in 2006. The change in status stems from the fact that, since 1993, astronomers have discovered thousands of objects similar to Pluto in size and composition, in the region o ...
... Why Isn’t Pluto a Planet? Pluto was called a planet from its discovery in 1930 until it was re-classified as a "dwarf planet" in 2006. The change in status stems from the fact that, since 1993, astronomers have discovered thousands of objects similar to Pluto in size and composition, in the region o ...
Estimate the Kelvin-Helmholtz timescale for a 5 solar mass star on
... On the other hand, Table 13.1 indicates that a 5 solar mass star spends about 350 000 years on the subgiant branch (between points 4 and 5). Why the discrepancy? (4 marks) [A discussion along the following lines earns a few bonus marks: The collapse that occurs is not of the entire star, but only of ...
... On the other hand, Table 13.1 indicates that a 5 solar mass star spends about 350 000 years on the subgiant branch (between points 4 and 5). Why the discrepancy? (4 marks) [A discussion along the following lines earns a few bonus marks: The collapse that occurs is not of the entire star, but only of ...
M - UC Berkeley Astronomy w
... is far from complete and modeling is usually carried out with semiempirical models. The first such model was The Minimum Solar Nebula (e.g., Hayashi et al. Protostars & Planets II, 1985). This model uses power-law distributions for density and temperature: q z 2 / 2 H 2 ...
... is far from complete and modeling is usually carried out with semiempirical models. The first such model was The Minimum Solar Nebula (e.g., Hayashi et al. Protostars & Planets II, 1985). This model uses power-law distributions for density and temperature: q z 2 / 2 H 2 ...
The Reason for the Seasons
... Earth’s rotation causes celestial objects to appear to move from east to west in Northern Hemisphere ...
... Earth’s rotation causes celestial objects to appear to move from east to west in Northern Hemisphere ...
the Voyage Visitor Guide
... grapefruit-sized model Sun near the National Air and Space Museum. The Sun is too far away to provide much heat or daylight. From Neptune, the Sun just looks like the brightest star in the sky. ...
... grapefruit-sized model Sun near the National Air and Space Museum. The Sun is too far away to provide much heat or daylight. From Neptune, the Sun just looks like the brightest star in the sky. ...
Earth-Moon-Sun Answer Key
... Your teacher asked you to look at the moon for a few minutes a day for 5 days. Which sentence is an observation you may make from this lesson? A. The moon circles the Earth. B. The moon spins as it travels. C. The moon has a different shape every day. D. The moon can be out during the summer or wint ...
... Your teacher asked you to look at the moon for a few minutes a day for 5 days. Which sentence is an observation you may make from this lesson? A. The moon circles the Earth. B. The moon spins as it travels. C. The moon has a different shape every day. D. The moon can be out during the summer or wint ...
Earth in the Universe Answer each in your binder or notebook. Date
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
... Which statement about stars is not accurate? A. A small group of stars is called a galaxy. B. Stars consist mainly of hydrogen and helium. C. Types of stars include red giants, super giants, and dwarf stars. D. Constellations of stars are found in different places in the sky. ...
Exoplanet Discovery
... 1) Are planets with R~2RE terrestrial or ice/gas composition 2) Multiple planets eg Why are these systems so flat? 3) Small planets ...
... 1) Are planets with R~2RE terrestrial or ice/gas composition 2) Multiple planets eg Why are these systems so flat? 3) Small planets ...
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.