Lecture Two (Powerpoint format)
... Cacophony in the Celestial Harmony -The Problem of Retrograde Motion The geocentric model of the universe works very well for stars, but there is a major problem for planetary motion. Occasionally, the outer planets will appear to slow down, stop, then reverse their direction on the night sky - ...
... Cacophony in the Celestial Harmony -The Problem of Retrograde Motion The geocentric model of the universe works very well for stars, but there is a major problem for planetary motion. Occasionally, the outer planets will appear to slow down, stop, then reverse their direction on the night sky - ...
Scientists classify stars by
... 2. If the remaining mass of the star is about 1.4 times that of our Sun, it will collapse further to become a neutron star. 3. If the remaining mass of the star is more than about three times that of the Sun, it will collapse and what is left behind is an intense region of gravity called a black hol ...
... 2. If the remaining mass of the star is about 1.4 times that of our Sun, it will collapse further to become a neutron star. 3. If the remaining mass of the star is more than about three times that of the Sun, it will collapse and what is left behind is an intense region of gravity called a black hol ...
Damian and Jack 7K
... electric charge and therefore do not interact much with the surrounding medium. As a result neutrons leave the core pretty quickly. The protons, which have positive electric charge, and the electrons, which have negative electric charge, remain in the core and cause the reactions which fuel the Sun. ...
... electric charge and therefore do not interact much with the surrounding medium. As a result neutrons leave the core pretty quickly. The protons, which have positive electric charge, and the electrons, which have negative electric charge, remain in the core and cause the reactions which fuel the Sun. ...
Life in the galactic danger zone
... giant planets to inhibit these terrestrial planets. The danger posed by high metallicity environments in the work of Lineweaver is higher than that of our work.” So, if you believe Gowanlock, the higher metallicity coupled with the high density of stars near the galactic centre means that although m ...
... giant planets to inhibit these terrestrial planets. The danger posed by high metallicity environments in the work of Lineweaver is higher than that of our work.” So, if you believe Gowanlock, the higher metallicity coupled with the high density of stars near the galactic centre means that although m ...
Astro110-01 Lecture 5 Eclipses of the Moon and the Sun, and other
... 1. Stars are so far away that stellar parallax is 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 a ...
... 1. Stars are so far away that stellar parallax is 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 a ...
Astronomy Merit program @ Huntley Meadows Park
... sure to learn something. Also our policy is that the program will not proceed if there are not 2 or more adults present for the program especially those containing hikes. We will attempt to enlist adult volunteers from our center but this is not always possible so prepare for the possibility that yo ...
... sure to learn something. Also our policy is that the program will not proceed if there are not 2 or more adults present for the program especially those containing hikes. We will attempt to enlist adult volunteers from our center but this is not always possible so prepare for the possibility that yo ...
jupiter facts for kids - National Astronomy Week 2014
... million miles). But when they are on opposite sides of the Sun, they can be as far apart as 968.2 million km (601.6 million miles). During National Astronomy Week 2014, Jupiter will be about 700 million kilometres (435 million miles) away from us. ...
... million miles). But when they are on opposite sides of the Sun, they can be as far apart as 968.2 million km (601.6 million miles). During National Astronomy Week 2014, Jupiter will be about 700 million kilometres (435 million miles) away from us. ...
Astronomy 10 - UC Berkeley Astronomy w
... (8) page 291, question 8 (a) The kind of element you have is determined by the number of protons. If you remove one neutron, you still have helium. This is what we call an isotope of helium. (b) Now you have changed helium into a different element because you have changed the number of protons. You ...
... (8) page 291, question 8 (a) The kind of element you have is determined by the number of protons. If you remove one neutron, you still have helium. This is what we call an isotope of helium. (b) Now you have changed helium into a different element because you have changed the number of protons. You ...
Student Text, pp. 139-144
... the search for answers to questions related to the patterns and motions of those objects. Until the late 1700s, Jupiter and Saturn were the only outer planets identified in our solar system because they were visible to the naked eye. Combined with the inner planets (Mercury, Venus, Earth, and Mars), ...
... the search for answers to questions related to the patterns and motions of those objects. Until the late 1700s, Jupiter and Saturn were the only outer planets identified in our solar system because they were visible to the naked eye. Combined with the inner planets (Mercury, Venus, Earth, and Mars), ...
A Closer Earth and the Faint Young Sun Paradox: Modification of the
... for the value of the Hubble parameter at the beginning of the Archean eon. At this point, it must be noticed that eq. (12) differs from eq. (27) at a ≈ 30σ level. Even putting aside such a numerical argument, there are also sound theoretical reasons to discard a cosmological origin for the putative ...
... for the value of the Hubble parameter at the beginning of the Archean eon. At this point, it must be noticed that eq. (12) differs from eq. (27) at a ≈ 30σ level. Even putting aside such a numerical argument, there are also sound theoretical reasons to discard a cosmological origin for the putative ...
Astronomy 12: Introduction to Astronomy
... b. The ejected envelope of a red giant that was formed from a sun-type star. c. The disk of material around a protostar that will eventually form planetary system. d. The initial massive gas cloud that stars and planets are formed from. 7. A white dwarf found in a binary system suddenly brightens, s ...
... b. The ejected envelope of a red giant that was formed from a sun-type star. c. The disk of material around a protostar that will eventually form planetary system. d. The initial massive gas cloud that stars and planets are formed from. 7. A white dwarf found in a binary system suddenly brightens, s ...
Document
... Contracting Fragments • Cloud about the size of solar system. • In the center: – Collapsing material continues to heat up. – Density causes heat to be retained. ...
... Contracting Fragments • Cloud about the size of solar system. • In the center: – Collapsing material continues to heat up. – Density causes heat to be retained. ...
slide-show source file - Bartol Research Institute
... For hot, luminous stars the driving is generally thought to stem from radiation pressure acting through line scattering. The Doppler shift of the line-profile within the expanding wind effectively “sweeps out” the star’s continuum momentum flux. This makes the driving force a function of the wind ...
... For hot, luminous stars the driving is generally thought to stem from radiation pressure acting through line scattering. The Doppler shift of the line-profile within the expanding wind effectively “sweeps out” the star’s continuum momentum flux. This makes the driving force a function of the wind ...
Outline of Lecture on Copernican Revolution: 5b: So, what was
... periods of their guiding centers, for the inner planets. ...
... periods of their guiding centers, for the inner planets. ...
PHYS101 Sec 001 Hour Exam No. 3 Preview 2 Page: 1 1 It
... a. It is the greater than the energy released when the hydrogen is burned, so we get a net loss of energy. b. It is the same as the energy released when the hydrogen is burned, so we get no net gain of energy. c. It is less than the energy released when the hydrogen is burned, so we get a net gain o ...
... a. It is the greater than the energy released when the hydrogen is burned, so we get a net loss of energy. b. It is the same as the energy released when the hydrogen is burned, so we get no net gain of energy. c. It is less than the energy released when the hydrogen is burned, so we get a net gain o ...
The Scientific Method
... His data were accurate to within 1/60 of one degree, i.e., to within 1 arc minute. (Comment‐‐A simple thing which Tycho did which greatly improved his accuracy was to make several measurements of quantities and to then average his results in order to arrive at his final answer. This is standard pra ...
... His data were accurate to within 1/60 of one degree, i.e., to within 1 arc minute. (Comment‐‐A simple thing which Tycho did which greatly improved his accuracy was to make several measurements of quantities and to then average his results in order to arrive at his final answer. This is standard pra ...
SWFAS August 16 Newsletter - Southwest Florida Astronomical
... sound the interior of our solar system's largest planet in a effort to tell the story of its current state and, perhaps, its origin and role in the formation of the solar system. "Where is the water?" is a major question that mission scientists expect Juno to answer. NASA's Galileo probe plunged int ...
... sound the interior of our solar system's largest planet in a effort to tell the story of its current state and, perhaps, its origin and role in the formation of the solar system. "Where is the water?" is a major question that mission scientists expect Juno to answer. NASA's Galileo probe plunged int ...
Star Formation - University of Redlands
... Contracting Fragments • Cloud about the size of solar system. • In the center: – Collapsing material continues to heat up. – Density causes heat to be retained. ...
... Contracting Fragments • Cloud about the size of solar system. • In the center: – Collapsing material continues to heat up. – Density causes heat to be retained. ...
Lec9_2D
... The gravity at the surface of a red giant star is extremely weak. Any excess motion in the stellar atmosphere can cause the star to lose its mass into space. During this phase, stars can lose a lot of mass. ...
... The gravity at the surface of a red giant star is extremely weak. Any excess motion in the stellar atmosphere can cause the star to lose its mass into space. During this phase, stars can lose a lot of mass. ...
Lecture 13 - Main Sequence Stars
... • We have been focusing on the properties of stars on the main sequence, but the chemical composition of stars change with time as the star burns hydrogen into helium. • This causes the other properties to change with time and we can track these changes via motion of the star in the HR diagram. ...
... • We have been focusing on the properties of stars on the main sequence, but the chemical composition of stars change with time as the star burns hydrogen into helium. • This causes the other properties to change with time and we can track these changes via motion of the star in the HR diagram. ...
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.