Meteoroid/Meteor/Meteorite Facts
... as a meteor. If you’ve ever looked up at the sky at night and seen a streak of light or ‘shooting star.’ what you are actually seeing is a meteor. 3. A meteoroid that survives falling through the Earth’s atmosphere and colliding with the Earth’s surface is known as a meteorite. 4. The Earth’s atmosp ...
... as a meteor. If you’ve ever looked up at the sky at night and seen a streak of light or ‘shooting star.’ what you are actually seeing is a meteor. 3. A meteoroid that survives falling through the Earth’s atmosphere and colliding with the Earth’s surface is known as a meteorite. 4. The Earth’s atmosp ...
study guide
... • Have varying atmospheres and geological activity • Only Earth has a significant Moon • The Moon! • Probably formed from an early collision ...
... • Have varying atmospheres and geological activity • Only Earth has a significant Moon • The Moon! • Probably formed from an early collision ...
Astro 7B – Solution Set 7 1 A Star is Born
... which indeed is much shorter than the 1010 yr age of the Galaxy. Any answer within a factor of 3 of ours will be given full credit (if you missed the factor of 22 in the collision cross section, then 1 point will be deducted). (b) STARS: Consider an elliptical galaxy: a giant quasi-spherical (read: ...
... which indeed is much shorter than the 1010 yr age of the Galaxy. Any answer within a factor of 3 of ours will be given full credit (if you missed the factor of 22 in the collision cross section, then 1 point will be deducted). (b) STARS: Consider an elliptical galaxy: a giant quasi-spherical (read: ...
The Ionosphere - Stanford Solar Center
... Space Environment Topics SE–12). At low latitudes the largest electron densities are found in peaks on either side of the magnetic equator; this is a feature known as the equatorial anomaly. The peak ionospheric concentrations do not occur on the equator, as might be expected from the maximum in sol ...
... Space Environment Topics SE–12). At low latitudes the largest electron densities are found in peaks on either side of the magnetic equator; this is a feature known as the equatorial anomaly. The peak ionospheric concentrations do not occur on the equator, as might be expected from the maximum in sol ...
1 Sun Stars Planets. Problem Sheet I
... 6. (a) For two protons to get close enough to fuse, they must approach one another in spite of the Coulomb repulsion of their two positive charges. Assuming that the two protons have the average kinetic energy (= 3/2 k T) and have a head-on collision, show that the temperature would have to be abou ...
... 6. (a) For two protons to get close enough to fuse, they must approach one another in spite of the Coulomb repulsion of their two positive charges. Assuming that the two protons have the average kinetic energy (= 3/2 k T) and have a head-on collision, show that the temperature would have to be abou ...
Science and the Universe - Wayne State University Physics and
... Other stars are also suns: typically enormous balls of glowing gas that generate vast amounts of energy and light via nuclear reactions Other stars look small and faint compared to our sun because they are extremely distant from us The nearest star beyond the Sun is Proxima Centauri, which is 4.3 LY ...
... Other stars are also suns: typically enormous balls of glowing gas that generate vast amounts of energy and light via nuclear reactions Other stars look small and faint compared to our sun because they are extremely distant from us The nearest star beyond the Sun is Proxima Centauri, which is 4.3 LY ...
Exploring Space
... The universe is everything in space—all matter and energy are part of it. Our Milky Way galaxy is just one of more than 125 billion known galaxies in the universe. A fundamental question in astronomy is: how did the universe form? In 1929, astronomer Edwin Hubble observed that all of the galaxies he ...
... The universe is everything in space—all matter and energy are part of it. Our Milky Way galaxy is just one of more than 125 billion known galaxies in the universe. A fundamental question in astronomy is: how did the universe form? In 1929, astronomer Edwin Hubble observed that all of the galaxies he ...
Neutrino mass and neutrino dark matter Do non
... • But light neutrinos are free streaming until trapped by galaxy cluster ...
... • But light neutrinos are free streaming until trapped by galaxy cluster ...
Structure of the solar system
... When two stars can not be seen but can be inferred due to the shift in their spectral lines. As one star (B) is moving away from Earth, its spectral lines (or absorption lines) will be red-shifted. As the other star is moving towards Earth (A), its lines will be blue-shifted. As they two stars are m ...
... When two stars can not be seen but can be inferred due to the shift in their spectral lines. As one star (B) is moving away from Earth, its spectral lines (or absorption lines) will be red-shifted. As the other star is moving towards Earth (A), its lines will be blue-shifted. As they two stars are m ...
Notes - IMSc
... temperature and shielding of external magnetic fields is now clear. The low temperatures are achieved by super-fluid Helium and its controlled evaporation is used to pass the vapour through the casing of the gyroscope and spin it up. (3) Guide Star: To detect a change in the direction of the spin ax ...
... temperature and shielding of external magnetic fields is now clear. The low temperatures are achieved by super-fluid Helium and its controlled evaporation is used to pass the vapour through the casing of the gyroscope and spin it up. (3) Guide Star: To detect a change in the direction of the spin ax ...
Section 1 - Signals from Space
... A ‘ shooting star’ is a meteoroid that enters the Earth’s atmosphere and is heated by the force of friction which causes it to glow. A certain meteoroid has a mass of 30 kg and enters the atmosphere at a speed of 4 000 m/s. Its specific heat capacity is 600 J /kgoC. (a) Calculate the heat energy pro ...
... A ‘ shooting star’ is a meteoroid that enters the Earth’s atmosphere and is heated by the force of friction which causes it to glow. A certain meteoroid has a mass of 30 kg and enters the atmosphere at a speed of 4 000 m/s. Its specific heat capacity is 600 J /kgoC. (a) Calculate the heat energy pro ...
Cosmology
... • Matter and anti-matter created via pair production. – Most pairs annihilate each other. – Inflation is so fast that some pairs are separated – But more matter than anti matter survives – Why? ...
... • Matter and anti-matter created via pair production. – Most pairs annihilate each other. – Inflation is so fast that some pairs are separated – But more matter than anti matter survives – Why? ...
new theory of non-expanding universe
... The numerical value of H comes to 1.8x10-4 when D is measured in light years and V in kilometers per second [1]. However, there is no general agreement on the precise value of H, which therefore is controversial. In UPT, the Hubble constant loses its meaning and significance since there is no recess ...
... The numerical value of H comes to 1.8x10-4 when D is measured in light years and V in kilometers per second [1]. However, there is no general agreement on the precise value of H, which therefore is controversial. In UPT, the Hubble constant loses its meaning and significance since there is no recess ...
doc
... measuring the rotation curves of these galaxies. If the mass of the galaxy were centrally concentrated, the rotation speed should drop as the square of the distance from the nucleus. Instead it appears the rotation curves remain flat out to large distance (beyond the visible edge of the galaxy), ind ...
... measuring the rotation curves of these galaxies. If the mass of the galaxy were centrally concentrated, the rotation speed should drop as the square of the distance from the nucleus. Instead it appears the rotation curves remain flat out to large distance (beyond the visible edge of the galaxy), ind ...
Lecture 8
... (except black holes), the MACHOs are usually thought of as ordinary substellar objects, such as brown dwarfs or “jupiters”. Ordinary stars can of course also cause a microlensing event, but then we would also see this star. Here we are interested in events where we do not observe light, or any other ...
... (except black holes), the MACHOs are usually thought of as ordinary substellar objects, such as brown dwarfs or “jupiters”. Ordinary stars can of course also cause a microlensing event, but then we would also see this star. Here we are interested in events where we do not observe light, or any other ...
PHYS103 Hour Exam No. 2 Preview 2 Page: 1 1 According to
... 1 According to Newton’s Law of Gravity, the gravitational attraction of the Earth for other objects, such as the Moon, apples on trees and space shuttles in low earth orbit, a. is smaller for objects farther from the Earth but never vanishes entirely. b. is the same no matter where those objects are ...
... 1 According to Newton’s Law of Gravity, the gravitational attraction of the Earth for other objects, such as the Moon, apples on trees and space shuttles in low earth orbit, a. is smaller for objects farther from the Earth but never vanishes entirely. b. is the same no matter where those objects are ...
What do “yellowballs” have to do with the birth of new stars?
... it is impossible to study the stars using a regular telescope. Fortunately, over the past few decades, astronomers have developed telescopes and detectors that are sensitive to invisible infrared light, which is a type of light that can pass through the dusty regions of the interstellar medium. Thes ...
... it is impossible to study the stars using a regular telescope. Fortunately, over the past few decades, astronomers have developed telescopes and detectors that are sensitive to invisible infrared light, which is a type of light that can pass through the dusty regions of the interstellar medium. Thes ...
When Stars Go Boom
... of matter exerts a gravitational pull on every other bit of matter in the Universe. While the strength of the force decreases rapidly with distance, it is still sufficiently strong to pull together massive clouds of gas and dust in interstellar space. As the clouds contract under the pull of gravity ...
... of matter exerts a gravitational pull on every other bit of matter in the Universe. While the strength of the force decreases rapidly with distance, it is still sufficiently strong to pull together massive clouds of gas and dust in interstellar space. As the clouds contract under the pull of gravity ...
- Europhysics News
... the Sun. Following the early concepts developed by Kant and Laplace in the 18th century, it is now agreed that solar system planets formed within a disk, following the gravitational collapse of the fragment of an interstellar cloud in fast rotation. The Sun formed at the center and, within the disk, ...
... the Sun. Following the early concepts developed by Kant and Laplace in the 18th century, it is now agreed that solar system planets formed within a disk, following the gravitational collapse of the fragment of an interstellar cloud in fast rotation. The Sun formed at the center and, within the disk, ...
GenGeoAstroII_Stars
... Lots of fine-grained dust, low density reflects short-wavelengths more efficiently than long ones ...
... Lots of fine-grained dust, low density reflects short-wavelengths more efficiently than long ones ...
The Galaxies
... ► Very little dust and gas to form stars. ► Filled with old stars: yellow and red giants. ► HUGE range in sizes! ► Ellipticals range is size from the smallest known galaxies (1,000 LY across and about a million stars) to the largest known galaxies (nearly a million LY across with tens of trillions o ...
... ► Very little dust and gas to form stars. ► Filled with old stars: yellow and red giants. ► HUGE range in sizes! ► Ellipticals range is size from the smallest known galaxies (1,000 LY across and about a million stars) to the largest known galaxies (nearly a million LY across with tens of trillions o ...
Astronomy Standards
... and revolution around the Sun resulted in seasons, but not the effect of direct or indirect rays of the Sun on the amount of heating that takes place. It is essential for students to know that: • The angle of the Sun’s rays due to the position of Earth in its orbit, the tilt of Earth’s axis, and the ...
... and revolution around the Sun resulted in seasons, but not the effect of direct or indirect rays of the Sun on the amount of heating that takes place. It is essential for students to know that: • The angle of the Sun’s rays due to the position of Earth in its orbit, the tilt of Earth’s axis, and the ...
Astronomy: Earth and Space Systems 8
... Previous/Future knowledge: In 1st grade (1-3.1), the Sun was a feature in the daytime sky. In 4th grade (4-3.2), the Sun, a star, is compared to Earth. Studying nuclear fusion in stars and the formation of elements from that fusion is part of high school Earth Science (ES-2.4). It is essential for s ...
... Previous/Future knowledge: In 1st grade (1-3.1), the Sun was a feature in the daytime sky. In 4th grade (4-3.2), the Sun, a star, is compared to Earth. Studying nuclear fusion in stars and the formation of elements from that fusion is part of high school Earth Science (ES-2.4). It is essential for s ...
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.