Neutron Stars and Black Holes
... X-rays. Matter that falls into the BH from the accretion disk just disappears. ...
... X-rays. Matter that falls into the BH from the accretion disk just disappears. ...
How to Become a Planet Hunter-Careers in
... – What is the typical mass distribution of planets in a system? – What is the typical radius distribution? – Are the orbits co-planar? Must have astrometry to answer this – Are the planets’ orbits stable? ...
... – What is the typical mass distribution of planets in a system? – What is the typical radius distribution? – Are the orbits co-planar? Must have astrometry to answer this – Are the planets’ orbits stable? ...
Greek Astronomy
... • Proposed a sun-centered (HELIOCENTRIC) universe where the Earth travelled around the Sun. • There were now 2 types of planets: those inside Earth’s orbits and those outside • Held onto the idea of epicycles and constant circular motion • Proposed that stars were very far away • Proposed that the E ...
... • Proposed a sun-centered (HELIOCENTRIC) universe where the Earth travelled around the Sun. • There were now 2 types of planets: those inside Earth’s orbits and those outside • Held onto the idea of epicycles and constant circular motion • Proposed that stars were very far away • Proposed that the E ...
Make one copy for each student on plain paper. Life Cycle of Star
... Nebula Don’t confuse a planetary nebula with a stellar nebula. A planetary nebula is near the end of an average star’s life before it turns into a white dwarf. ...
... Nebula Don’t confuse a planetary nebula with a stellar nebula. A planetary nebula is near the end of an average star’s life before it turns into a white dwarf. ...
Lecture 15 (pdf from the powerpoint)
... as temperatures in the Sun's core, where nuclear fusion ...
... as temperatures in the Sun's core, where nuclear fusion ...
Astronomy 20 Homework # 2
... Handed out on October 8, 2004 Due in class on Friday, October 15, 2004 1. What are the apparent bolometric magnitudes of: (a) a Sun-like star 50 pc away? (b) a 100 Watt lightbulb 10 km away? (c) a galaxy containing ∼ 3 × 1010 stars of an average luminosity ∼ 0.5L⊙ 20 Mpc away? (d) A quasar with lumi ...
... Handed out on October 8, 2004 Due in class on Friday, October 15, 2004 1. What are the apparent bolometric magnitudes of: (a) a Sun-like star 50 pc away? (b) a 100 Watt lightbulb 10 km away? (c) a galaxy containing ∼ 3 × 1010 stars of an average luminosity ∼ 0.5L⊙ 20 Mpc away? (d) A quasar with lumi ...
(Part I) 1. Practice Quiz 2. Introduction 3. Earth Spins Around Its Axis
... and setting of the Sun and stars The revolution of the Earth around the Sun determines the year The tilt of the Earth determines the seasons The spinning, revolution and tilt determine the part of the sky which is visible You want/need to understand these motions Next time, we will look at how the M ...
... and setting of the Sun and stars The revolution of the Earth around the Sun determines the year The tilt of the Earth determines the seasons The spinning, revolution and tilt determine the part of the sky which is visible You want/need to understand these motions Next time, we will look at how the M ...
Study Guide for Quiz #2
... Why do we always see the same side of the moon? How should you determine if a theory is accurate? What does a magnetic field exert a force on? What can a magnetic field do? Describe how a planet produces a magnetic field. What is the solar wind? What is the magnetosphere? How are auroras and the Van ...
... Why do we always see the same side of the moon? How should you determine if a theory is accurate? What does a magnetic field exert a force on? What can a magnetic field do? Describe how a planet produces a magnetic field. What is the solar wind? What is the magnetosphere? How are auroras and the Van ...
Scientific Results Summary
... Subaru Telescope continues to expand the boundaries of astronomical knowledge and cosmological understanding. Another busy year of observations brought discoveries of interest to subjects ranging from Solar System bodies to stellar composition and distant dark matter. Subaru continues to lead the pa ...
... Subaru Telescope continues to expand the boundaries of astronomical knowledge and cosmological understanding. Another busy year of observations brought discoveries of interest to subjects ranging from Solar System bodies to stellar composition and distant dark matter. Subaru continues to lead the pa ...
Chapter 2 PowerPoint
... – Unbalanced forces cause rotation axis to wobble • Directly proportional to angular momentum • Circular motion of the axis projected into space ...
... – Unbalanced forces cause rotation axis to wobble • Directly proportional to angular momentum • Circular motion of the axis projected into space ...
Unit A: Trees and Forests
... day and night, while a revolution is one complete trip of a planet or moon around its star or planet. An equinox is one of the two days each year when the Sun is directly over the Equator and visible in the sky for 12 hours (spring and fall), while a solstice is one of two days each years when the s ...
... day and night, while a revolution is one complete trip of a planet or moon around its star or planet. An equinox is one of the two days each year when the Sun is directly over the Equator and visible in the sky for 12 hours (spring and fall), while a solstice is one of two days each years when the s ...
Chapter 17 - Earth`s Place in Space
... Is this because the Earth rotates on its axis, or because the earth orbits the sun? The stars seem to rotate because the Earth rotates on its ...
... Is this because the Earth rotates on its axis, or because the earth orbits the sun? The stars seem to rotate because the Earth rotates on its ...
Neutron stars and black holes
... X-rays. Matter that falls into the BH from the accretion disk just disappears. ...
... X-rays. Matter that falls into the BH from the accretion disk just disappears. ...
July 2005 - Western Nevada Astronomical Society
... Q: What is meant by “Opposition and “Superior Conjunction” If you look at the monthly calendar for August you will see that Neptune is at opposition on the 8th! What that means for amateur astronomers is that Neptune is now at its closest to Earth, opposite the sun in relation to Earth and its the b ...
... Q: What is meant by “Opposition and “Superior Conjunction” If you look at the monthly calendar for August you will see that Neptune is at opposition on the 8th! What that means for amateur astronomers is that Neptune is now at its closest to Earth, opposite the sun in relation to Earth and its the b ...
Saturn
... Saturn’s Surface Saturn is a giant ball of gas Believed to have no solid surface Inner core of iron and rocky material Outer core of ammonia, methane, and water Liquid metallic hydrogen surrounds outer core Hydrogen and helium in a viscous form ...
... Saturn’s Surface Saturn is a giant ball of gas Believed to have no solid surface Inner core of iron and rocky material Outer core of ammonia, methane, and water Liquid metallic hydrogen surrounds outer core Hydrogen and helium in a viscous form ...
Astronomical Knowledge Questionnaire (Teacher
... 12 When the Sun reaches the end of its life, what will happen to it? It will turn into a black hole. It will have lost its outer layers, leaving its core behind. It will explode, destroying Earth. It will not die due to its mass. I do not know the answer to this question. 13 How did the pl ...
... 12 When the Sun reaches the end of its life, what will happen to it? It will turn into a black hole. It will have lost its outer layers, leaving its core behind. It will explode, destroying Earth. It will not die due to its mass. I do not know the answer to this question. 13 How did the pl ...
Scientific astrology
... • “…the conclusion seems to be inevitable, that my conjecture that the variations of spot-frequency depend on the influences of Venus, Earth, Jupiter and Saturn, will not prove to be wholly unfounded. The prepondering planet Jupiter will in such case mainly determine the length and height of the wa ...
... • “…the conclusion seems to be inevitable, that my conjecture that the variations of spot-frequency depend on the influences of Venus, Earth, Jupiter and Saturn, will not prove to be wholly unfounded. The prepondering planet Jupiter will in such case mainly determine the length and height of the wa ...
PS 224, Fall 2014 HW 4
... a: Dark cloud: Large molecular clouds develop dense regions that appear darker than surrounding regions. This can be precipitated by external pressure or forces or random fluctuations present in the cloud. These regions are very large, typically around 200,000 AU. b: Gravitational collapse: When the ...
... a: Dark cloud: Large molecular clouds develop dense regions that appear darker than surrounding regions. This can be precipitated by external pressure or forces or random fluctuations present in the cloud. These regions are very large, typically around 200,000 AU. b: Gravitational collapse: When the ...
Eclipses
... Sun and Moon are exactly in line, but the apparent size of the Moon is smaller than that of the Sun. •A hybrid eclipse is intermediate between a total and annular eclipse. At some points on the surface of the Earth it is visible as a total eclipse, whereas at others it is annular. ...
... Sun and Moon are exactly in line, but the apparent size of the Moon is smaller than that of the Sun. •A hybrid eclipse is intermediate between a total and annular eclipse. At some points on the surface of the Earth it is visible as a total eclipse, whereas at others it is annular. ...
5 Habitable zones and Planetary atmospheres
... is due to the relative size of its iron core which is significantly larger than for any other terrestrial planet. One possible explanation is that Mercury’s lighter mantle/crust was eroded away by the strong (~1,000 times present values) winds and the early Sun’s higher extreme ultraviolet fluxes. T ...
... is due to the relative size of its iron core which is significantly larger than for any other terrestrial planet. One possible explanation is that Mercury’s lighter mantle/crust was eroded away by the strong (~1,000 times present values) winds and the early Sun’s higher extreme ultraviolet fluxes. T ...
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.