Universe Now - Course Pages of Physics Department
... dynamics of the outer Solar System during 100 years (with a time step of 200 days). White: plutinos (Pluto as large, white circle) Blue squares: comets (in perihelion around year 2002) Orange: centaurs Red: Classical TNOs Magenta: scattered disc objects Cyan: higheccentricity objects Planets: Jupite ...
... dynamics of the outer Solar System during 100 years (with a time step of 200 days). White: plutinos (Pluto as large, white circle) Blue squares: comets (in perihelion around year 2002) Orange: centaurs Red: Classical TNOs Magenta: scattered disc objects Cyan: higheccentricity objects Planets: Jupite ...
Grade 9 Science – Unit 4
... The Sun The most important star for Earth is the Sun. Why? The Sun provides heat and light energy for all living things The Sun’s gravitational pull keeps Earth in a steady orbit (i.e., the right distance to support life). How is heat and light energy produced? NUCLEAR FUSION – under extremely ...
... The Sun The most important star for Earth is the Sun. Why? The Sun provides heat and light energy for all living things The Sun’s gravitational pull keeps Earth in a steady orbit (i.e., the right distance to support life). How is heat and light energy produced? NUCLEAR FUSION – under extremely ...
The Sun - the University of Redlands
... The Photosphere • This is the origin of the 5,800 K thermal radiation we see. l = k/T = k/(5800 K) l = 480 nm (visible light) • This is the light we see. • That’s why we see this as the surface. ...
... The Photosphere • This is the origin of the 5,800 K thermal radiation we see. l = k/T = k/(5800 K) l = 480 nm (visible light) • This is the light we see. • That’s why we see this as the surface. ...
Structure of the Sun, our nearest star
... o The temperature and density are sufficient to allow nuclear fusion to occur. o Stars are primarily composed of hydrogen, with small amounts of helium. o They are so hot that the ____________________ are stripped from the atomic nuclei. o This ionized gas is called a ____________________. ...
... o The temperature and density are sufficient to allow nuclear fusion to occur. o Stars are primarily composed of hydrogen, with small amounts of helium. o They are so hot that the ____________________ are stripped from the atomic nuclei. o This ionized gas is called a ____________________. ...
Science 9: Unit 4 Review
... 4. American astronomer Edwin Hubble noticed that the light from distant galaxies was shifted toward the red part of the spectrum. What explanation did he give for this? ...
... 4. American astronomer Edwin Hubble noticed that the light from distant galaxies was shifted toward the red part of the spectrum. What explanation did he give for this? ...
16 October 2006
... • Partial answers are not hard to guess… • Detailed answers require an account of how the solar system formed. ...
... • Partial answers are not hard to guess… • Detailed answers require an account of how the solar system formed. ...
Rotation of the Earth
... Without this gravitational force of the mass of the sun the earth would shoot into outer space. Without the lateral movement the earth would crash onto the sun. The balance between gravity and the lateral movement keeps the earth in its orbit. Where then does this motion come from? In order to answe ...
... Without this gravitational force of the mass of the sun the earth would shoot into outer space. Without the lateral movement the earth would crash onto the sun. The balance between gravity and the lateral movement keeps the earth in its orbit. Where then does this motion come from? In order to answe ...
Astronomy 100 Homework #2 Solutions 1, Problem 3‐27 (2 pts
... 1, Problem 3‐27 (2 pts). According to Kepler’s third law, (b) Jupiter orbits the Sun more quickly than Saturn. Because the semimajor axis is smaller, the orbital period P = a3/2 will be smaller. 2. Problem 3‐40 (2 pts). The recently discovered object Sedna orbits our sun beyond Pluto, at an ave ...
... 1, Problem 3‐27 (2 pts). According to Kepler’s third law, (b) Jupiter orbits the Sun more quickly than Saturn. Because the semimajor axis is smaller, the orbital period P = a3/2 will be smaller. 2. Problem 3‐40 (2 pts). The recently discovered object Sedna orbits our sun beyond Pluto, at an ave ...
previous mid-term () - Department of Physics and Astronomy
... c. The Sun’s radiation pushes gas to the outer solar system. d. Planet cores sweep up huge volumes of gas. e. Remaining planetesimals are accreted by the sun and planets leaving impact craters. 57. Comets are believed to originate in a. primordial debris from the Jovian system ejected by Jupiter’s m ...
... c. The Sun’s radiation pushes gas to the outer solar system. d. Planet cores sweep up huge volumes of gas. e. Remaining planetesimals are accreted by the sun and planets leaving impact craters. 57. Comets are believed to originate in a. primordial debris from the Jovian system ejected by Jupiter’s m ...
Document
... no beginning and will continue forever. Although the universe is expanding, it maintains its average density – steady-state – through the continuous creation of new matter. Most cosmologists now reject the theory because it cannot explain background radiation or the observation that the appearance o ...
... no beginning and will continue forever. Although the universe is expanding, it maintains its average density – steady-state – through the continuous creation of new matter. Most cosmologists now reject the theory because it cannot explain background radiation or the observation that the appearance o ...
The Sun PPT
... A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. When this happens, a tremendous amount of energy is created causing the star to heat up and shine ...
... A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. When this happens, a tremendous amount of energy is created causing the star to heat up and shine ...
lecture 32 orbits
... that Earth is located at the center of the universe. The stars were fixed to the outermost shell. There are 7 concentric spherical shells, each containing one object: Sun, Moon, or a planet (5 planets were known then). The shells rotate uniformly around Earth. ...
... that Earth is located at the center of the universe. The stars were fixed to the outermost shell. There are 7 concentric spherical shells, each containing one object: Sun, Moon, or a planet (5 planets were known then). The shells rotate uniformly around Earth. ...
The Solar System and its Planets
... Bellona. The dwarf planet Eris is named aoer the goddess, as is the religion Discordianism. (from Wikipedia entry about the Goddess) ...
... Bellona. The dwarf planet Eris is named aoer the goddess, as is the religion Discordianism. (from Wikipedia entry about the Goddess) ...
The Origin of the Solar System
... with the condensation sequence caused by different conditions in the inner and the outer parts of the nebula The Solar System is different from the other planetary systems found so far: they frequently have Jovian planets close to parent stars (after migration caused by interaction with the nebular ...
... with the condensation sequence caused by different conditions in the inner and the outer parts of the nebula The Solar System is different from the other planetary systems found so far: they frequently have Jovian planets close to parent stars (after migration caused by interaction with the nebular ...
Our Solar System
... are also made of rock and have few or no moons. The outer planets—Jupiter, Saturn, Uranus, and Neptune—are huge, mostly gaseous, and have rings. The outer planets also have many moons. In general, the farther a planet is from the sun, the colder it is. Between Mars and Jupiter is the asteroid belt, ...
... are also made of rock and have few or no moons. The outer planets—Jupiter, Saturn, Uranus, and Neptune—are huge, mostly gaseous, and have rings. The outer planets also have many moons. In general, the farther a planet is from the sun, the colder it is. Between Mars and Jupiter is the asteroid belt, ...
PH109 Exploring the Universe, Test #2 Fall 04
... 27. The Oort Cloud is thought to be: a) The cloud of gas and dust from which our solar system formed. b) A cloud of debris that occasionally encounters the Earth, causing a meteor shower. c) A cloud of comets surrounding the solar system. d) A cloud of asteroids moving between the orbits of Mars and ...
... 27. The Oort Cloud is thought to be: a) The cloud of gas and dust from which our solar system formed. b) A cloud of debris that occasionally encounters the Earth, causing a meteor shower. c) A cloud of comets surrounding the solar system. d) A cloud of asteroids moving between the orbits of Mars and ...
ASTRONOMY
... • The system of planets and other objects that orbit the Sun in a circular pattern. • The force of GRAVITY is a force of attraction between masses. • The Sun has a very large mass and therefore a strong force of gravity that pulls on the Earth and the other planets, keeping them in orbit. ...
... • The system of planets and other objects that orbit the Sun in a circular pattern. • The force of GRAVITY is a force of attraction between masses. • The Sun has a very large mass and therefore a strong force of gravity that pulls on the Earth and the other planets, keeping them in orbit. ...
PS 224: Astronomy Fall 2014 Midterm (October 16, 2014)
... I would not believe this claim because this is a “very old” star with rare-earth elements. Such heavy elements are only produced in supernovae, so the earliest stars probably do not have those elements. So it is unlikely that a “very old” star has rare earth elements. To test this I would conduct sp ...
... I would not believe this claim because this is a “very old” star with rare-earth elements. Such heavy elements are only produced in supernovae, so the earliest stars probably do not have those elements. So it is unlikely that a “very old” star has rare earth elements. To test this I would conduct sp ...
Solar System has 8 planets instead of 9 — IAU official vote
... and brought three other objects into the cosmic club. Pluto has been considered a planet since its discovery in 1930 by the American Clyde Tombaugh. The ninth planet will now effectively be airbrushed out of school and university textbooks. “The eight planets are Mercury, Venus, Earth, Mars, Jupiter ...
... and brought three other objects into the cosmic club. Pluto has been considered a planet since its discovery in 1930 by the American Clyde Tombaugh. The ninth planet will now effectively be airbrushed out of school and university textbooks. “The eight planets are Mercury, Venus, Earth, Mars, Jupiter ...
File
... Since our book was published, some exciting discoveries have been made in the region that lies outside of the orbit of Neptune. The region is called the Kuiper Belt and is the home to many dwarf planets, including Pluto and Eris, which was only discovered in 2005. Eris is bigger than Pluto! In 2006, ...
... Since our book was published, some exciting discoveries have been made in the region that lies outside of the orbit of Neptune. The region is called the Kuiper Belt and is the home to many dwarf planets, including Pluto and Eris, which was only discovered in 2005. Eris is bigger than Pluto! In 2006, ...
The Sun
... • Places where the sun’s magnetic field is concentrated and inhibits the normal convective flow of hot material from below. So the material sits on the surface and cools off as it radiates to the sky. • Charged particles in a magnetic field feel a force sideways to their motion, binding the gas to t ...
... • Places where the sun’s magnetic field is concentrated and inhibits the normal convective flow of hot material from below. So the material sits on the surface and cools off as it radiates to the sky. • Charged particles in a magnetic field feel a force sideways to their motion, binding the gas to t ...
Is there anybody out there?
... • fc = fraction of planets where complex metazoans arise • fl = percentage of a lifetime of a planet that is marked by the presence of complex metazoans • fm = fraction of planets with a large moon • fj = fraction of solar systems with Jupiter sized planets • fme = Fraction of planets with criticall ...
... • fc = fraction of planets where complex metazoans arise • fl = percentage of a lifetime of a planet that is marked by the presence of complex metazoans • fm = fraction of planets with a large moon • fj = fraction of solar systems with Jupiter sized planets • fme = Fraction of planets with criticall ...
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.