Lecture 6
... systems with galaxies orbiting inside them on randomly oriented orbits, similar to the scrambled stellar orbits that make up the spheroidal halo of the Milky Way. Galaxies in clusters are moving at speeds over 1000 km/sec. There is not enough mass in stars to hold these clusters together…there must ...
... systems with galaxies orbiting inside them on randomly oriented orbits, similar to the scrambled stellar orbits that make up the spheroidal halo of the Milky Way. Galaxies in clusters are moving at speeds over 1000 km/sec. There is not enough mass in stars to hold these clusters together…there must ...
AS 60 - Astronomy of the Americas
... 5. Is the Milky Way at the center of the Universe? a. Since essentially all galaxies are moving toward the Milky Way, our Galaxy is the center of the Universe b. Since essentially all galaxies are moving away from the Milky Way, our Galaxy is the center of the Universe c. Even though essentially all ...
... 5. Is the Milky Way at the center of the Universe? a. Since essentially all galaxies are moving toward the Milky Way, our Galaxy is the center of the Universe b. Since essentially all galaxies are moving away from the Milky Way, our Galaxy is the center of the Universe c. Even though essentially all ...
Week 11 notes
... • Grain sizes range from about 1 μ m (10-4 cm) down to a few tens of Angstroms (10-7 cm). • Dust particles absorb and scatter some fraction of the incident radiation. The shorter the wavelength of the photon, the higher the efficiency of this process (and vice versa): i.e., ultraviolet photons are e ...
... • Grain sizes range from about 1 μ m (10-4 cm) down to a few tens of Angstroms (10-7 cm). • Dust particles absorb and scatter some fraction of the incident radiation. The shorter the wavelength of the photon, the higher the efficiency of this process (and vice versa): i.e., ultraviolet photons are e ...
Doomed, Insignificant, and Ignorant
... • Ironically the term was coined by Fred Hoyle, he was the main proponent of the Steady State Model, in a 1949 radio broadcast. ...
... • Ironically the term was coined by Fred Hoyle, he was the main proponent of the Steady State Model, in a 1949 radio broadcast. ...
8th Grade Science Midterm Review Put all answers on a separate
... A second is about the time for one heart beat. A kilogram is about the mass of a text book. 2. What are metric units for distance, time, speed, acceleration, and force? A unit describes how an idea is measured. Distance is measured in [m]. Time is measured in [s]. Speed is measured in [m/s]. Acceler ...
... A second is about the time for one heart beat. A kilogram is about the mass of a text book. 2. What are metric units for distance, time, speed, acceleration, and force? A unit describes how an idea is measured. Distance is measured in [m]. Time is measured in [s]. Speed is measured in [m/s]. Acceler ...
Tentamen f¨or kursen Rymdfysik (1FA255) 2015-10-23
... iv. If a magnetic field is frozen into a plasma, two plasma elements which at one time are on the same magnetic field line will always be so. v. As the plasma in interplanetary space is tenuous, the interplanetary magnetic field decays with distance r from the Sun at least as fast as 1/r3 . (b) Figu ...
... iv. If a magnetic field is frozen into a plasma, two plasma elements which at one time are on the same magnetic field line will always be so. v. As the plasma in interplanetary space is tenuous, the interplanetary magnetic field decays with distance r from the Sun at least as fast as 1/r3 . (b) Figu ...
Science News May 1 2004 - Department of Physics and Astronomy
... Many scientists have suspected that life on Earth stems from complex organic molecules delivered via meteorites, comets, and the dust particles that populate space. Cosmic dust containing carbon continues to enter Earth's atmosphere and settle on the planet's surface. However, chemical evidence pinp ...
... Many scientists have suspected that life on Earth stems from complex organic molecules delivered via meteorites, comets, and the dust particles that populate space. Cosmic dust containing carbon continues to enter Earth's atmosphere and settle on the planet's surface. However, chemical evidence pinp ...
WCPS Available Shows @ The William Brish Planetarium
... Examine many of the seasonal customs based on light as well as various winter holiday traditions including Yule, greenery, Santa and the Christmas Star. Over 400 years ago Galileo revolutionized astronomy and science by using a telescope to observe the sky. Witness the history and modern uses of thi ...
... Examine many of the seasonal customs based on light as well as various winter holiday traditions including Yule, greenery, Santa and the Christmas Star. Over 400 years ago Galileo revolutionized astronomy and science by using a telescope to observe the sky. Witness the history and modern uses of thi ...
Cosmology – The Origin and Evolution of the Universe
... must be moving away from us FASTER than the speed of light! • In a way – yes. But space itself does not have such speed limits. Only matter within space. Space is expanding, carrying the galaxies with it. These galaxies beyond the horizon are unobservable, even in principle, so it’s not meaningful t ...
... must be moving away from us FASTER than the speed of light! • In a way – yes. But space itself does not have such speed limits. Only matter within space. Space is expanding, carrying the galaxies with it. These galaxies beyond the horizon are unobservable, even in principle, so it’s not meaningful t ...
No Slide Title
... It is probable that our universe is infinite and has been filled with matter everywhere since the Big Bang There is also good evidence that in the early universe that the universe may have expanded much faster than the speed of light. It is possible to inflate space so that although particles are n ...
... It is probable that our universe is infinite and has been filled with matter everywhere since the Big Bang There is also good evidence that in the early universe that the universe may have expanded much faster than the speed of light. It is possible to inflate space so that although particles are n ...
1.1 Fundamental Observers
... If the first term in (1.12) does not dominate, the particle will be moving with a substantial fraction of c, and so it is relativistic. Baryons — make up the familiar matter of our universe. By baryons we mean primarily protons and neutrons, the only stable elementary particles made up of quarks (tw ...
... If the first term in (1.12) does not dominate, the particle will be moving with a substantial fraction of c, and so it is relativistic. Baryons — make up the familiar matter of our universe. By baryons we mean primarily protons and neutrons, the only stable elementary particles made up of quarks (tw ...
Educator`s Guide
... Instruct the students to place the pictures in order from smallest to largest. Allow up to 5 minutes and encourage logical discussion based on current knowledge. HINTS You can give one or more hints as needed. The letters below correspond to the letters representing the images. A. The distance betwe ...
... Instruct the students to place the pictures in order from smallest to largest. Allow up to 5 minutes and encourage logical discussion based on current knowledge. HINTS You can give one or more hints as needed. The letters below correspond to the letters representing the images. A. The distance betwe ...
Gravity Reading - Northwest ISD Moodle
... wouldn't be any orbits, instead all planetary bodies would simply float around, running into each other when they crossed paths and forever just wander. ...
... wouldn't be any orbits, instead all planetary bodies would simply float around, running into each other when they crossed paths and forever just wander. ...
File - Lone Star Science with Mr. Zuber
... – What is visible radiation? – What two types of non-visible radiation affect us every day? ...
... – What is visible radiation? – What two types of non-visible radiation affect us every day? ...
Study Guide: Use your notes and handouts to answer the following
... Neptune (further from Sun than other planets) 3. What are significant characteristics of each planet in our solar system? Mercury is the closest planet to the Sun. Mercury is smallest of current planets. It is covered with craters. Venus, the second planet away from the Sun, is Earth’s closest neigh ...
... Neptune (further from Sun than other planets) 3. What are significant characteristics of each planet in our solar system? Mercury is the closest planet to the Sun. Mercury is smallest of current planets. It is covered with craters. Venus, the second planet away from the Sun, is Earth’s closest neigh ...
April 2013
... The timescale for this travel is based in part on the observation of such radioactive fragments as 4Be10. This radionuclide has a half-life of 1.5 million years, and the number of such particles that can survive to be detected on Earth depends on their total travel time. But 4Be10 is also produced i ...
... The timescale for this travel is based in part on the observation of such radioactive fragments as 4Be10. This radionuclide has a half-life of 1.5 million years, and the number of such particles that can survive to be detected on Earth depends on their total travel time. But 4Be10 is also produced i ...
Putting a Spin on the Solar System
... All of the stars in the universe are arranged in huge structures called galaxies. Each galaxy contains billions of stars. There are billions of galaxies in the universe. Amazing! It sort of hurts your brain just thinking about it! Our star, the sun, is located in a galaxy named the Milky Way. The ne ...
... All of the stars in the universe are arranged in huge structures called galaxies. Each galaxy contains billions of stars. There are billions of galaxies in the universe. Amazing! It sort of hurts your brain just thinking about it! Our star, the sun, is located in a galaxy named the Milky Way. The ne ...
Science 3rd prep. 1st term unit 3 lesson 2 The Solar System Millions
... 3-The modern theory of the world (Alfred Hale,1944) This theory is based on - what is sometimes seen when a star glows for a short time to be one of the most shining stars in the sky. - After a day or two, its glow disappears gradually to return as it was. - The reason for that glow is not precisely ...
... 3-The modern theory of the world (Alfred Hale,1944) This theory is based on - what is sometimes seen when a star glows for a short time to be one of the most shining stars in the sky. - After a day or two, its glow disappears gradually to return as it was. - The reason for that glow is not precisely ...
Chapter 34: Cosmology FYI 1. Radar Ranging 2. Triangulation idea
... huge clouds of hydrogen gas. •Particularly dense regions compressed by gravity to for stars. •Currently our universe is dominated by fusion of hydrogen to form helium. •Structure is stable now, but what happens when hydrogen is used up ...
... huge clouds of hydrogen gas. •Particularly dense regions compressed by gravity to for stars. •Currently our universe is dominated by fusion of hydrogen to form helium. •Structure is stable now, but what happens when hydrogen is used up ...
Cosmology - RHIG - Wayne State University
... galaxy's center. Orbital speed is found from the doppler shifts of the 21-cm line radiation from the atomic hydrogen gas. Since gravity depends on mass and distance, knowing the size of the star orbits enables you to derive the galaxy's mass. ...
... galaxy's center. Orbital speed is found from the doppler shifts of the 21-cm line radiation from the atomic hydrogen gas. Since gravity depends on mass and distance, knowing the size of the star orbits enables you to derive the galaxy's mass. ...
Faintest Star Cluster Yet Found on Outskirts of Milky Way | Globular
... which separate light into its constituent wavelengths and allow astronomers to calculate how fast stars are moving, showed that the globular cluster's stars were moving at different velocities than those in Ursa Minor, suggesting the two entities were separate. And very preliminary measurements of t ...
... which separate light into its constituent wavelengths and allow astronomers to calculate how fast stars are moving, showed that the globular cluster's stars were moving at different velocities than those in Ursa Minor, suggesting the two entities were separate. And very preliminary measurements of t ...
10.1
... everything in it began in an event that took place about 13.7 billion years ago. Before this event, there were no celestial bodies. There was no energy and there was no matter of any kind—not even atoms, protons, or electrons. According to the theory, the Big Bang event gave rise to all the energy a ...
... everything in it began in an event that took place about 13.7 billion years ago. Before this event, there were no celestial bodies. There was no energy and there was no matter of any kind—not even atoms, protons, or electrons. According to the theory, the Big Bang event gave rise to all the energy a ...
earth`s atmosphere sky watChÍng
... What objects are in the sky? There are thousands of objects in the sky above Earth. These are Earth’s neighbours – the Sun, the Moon, planets, stars and flying space rocks (comets, asteroids and meteoroids). Some can be seen at night and others can be seen during the day. Although some are visible w ...
... What objects are in the sky? There are thousands of objects in the sky above Earth. These are Earth’s neighbours – the Sun, the Moon, planets, stars and flying space rocks (comets, asteroids and meteoroids). Some can be seen at night and others can be seen during the day. Although some are visible w ...
Exam Name___________________________________
... A) a few million solar masses B) hundreds of trillions of solar masses C) a hundred million solar masses D) a few billion solar masses E) a trillion solar masses ...
... A) a few million solar masses B) hundreds of trillions of solar masses C) a hundred million solar masses D) a few billion solar masses E) a trillion solar masses ...
Outer space
Outer space, or just space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvin in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. In most galaxies, observations provide evidence that 90% of the mass is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Data indicates that the majority of the mass-energy in the observable Universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.There is no firm boundary where space begins. However the Kármán line, at an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space. Despite the drafting of UN resolutions for the peaceful uses of outer space, anti-satellite weapons have been tested in Earth orbit.Humans began the physical exploration of space during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches. Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System. Due to the high cost of getting into space, manned spaceflight has been limited to low Earth orbit and the Moon.Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental issues, the economic cost of putting objects, including humans, into space is high.