The Milky Way - University of North Texas
... b. Objects below this mass can only form in HI clouds. c. Objects below this mass are not hot enough to fuse normal hydrogen. d. They form too slowly and hot stars nearby clear the gas and dust quickly. e. Our telescopes do not have enough light gathering power to detect dim objects. ...
... b. Objects below this mass can only form in HI clouds. c. Objects below this mass are not hot enough to fuse normal hydrogen. d. They form too slowly and hot stars nearby clear the gas and dust quickly. e. Our telescopes do not have enough light gathering power to detect dim objects. ...
Resonance Trapping in Protoplanetary Discs
... the material needed to assemble the core cannot be found in a solid phase. The implication is that the planet formed much farther out and migrated inward. It was theorized that tidal interactions between the planet and the protoplanetary disc–the disc surrounding young stars where we believe form pl ...
... the material needed to assemble the core cannot be found in a solid phase. The implication is that the planet formed much farther out and migrated inward. It was theorized that tidal interactions between the planet and the protoplanetary disc–the disc surrounding young stars where we believe form pl ...
The Life Cycle of A Star
... or so. A wondrous event occurs.... nuclear fusion begins and the ball of gas and dust starts to glow. A new star has begun its life in our Universe. So what is this magical thing called "nuclear fusion" and why does it start happening inside the ball of gas and dust? It happens like this..... As the ...
... or so. A wondrous event occurs.... nuclear fusion begins and the ball of gas and dust starts to glow. A new star has begun its life in our Universe. So what is this magical thing called "nuclear fusion" and why does it start happening inside the ball of gas and dust? It happens like this..... As the ...
Thermonuclear Reactions: The Beginning and the
... by photons and photons created by annihilation of particles. The temperature must have been $ 1013K, but no light was emitted, because of the enormous gravitational force pulled the photons back. The system was supposed to be in a unique state with no repulsion forces. However, just as a bottle of s ...
... by photons and photons created by annihilation of particles. The temperature must have been $ 1013K, but no light was emitted, because of the enormous gravitational force pulled the photons back. The system was supposed to be in a unique state with no repulsion forces. However, just as a bottle of s ...
Unit 6: Astronomy
... How fast can you go? Actually, every second you travel 18.5 miles through space! That's right, 18.5 miles per second, or 1110 miles in one hour! And as a passenger on the planet Earth, each year you travel approximately 600 million miles along the Earth's orbit around the Sun, held in orbit by gravi ...
... How fast can you go? Actually, every second you travel 18.5 miles through space! That's right, 18.5 miles per second, or 1110 miles in one hour! And as a passenger on the planet Earth, each year you travel approximately 600 million miles along the Earth's orbit around the Sun, held in orbit by gravi ...
Lesson Plan D2 Comets and Meteors
... shape, and made of ancient material from the formation of the solar system. They differ in their compositions and orbits. Asteroids are composed mainly of rock and metal, while comets are made of ice and rock. Asteroids tend to have near-circular orbits that lie in the plane of the solar system. Com ...
... shape, and made of ancient material from the formation of the solar system. They differ in their compositions and orbits. Asteroids are composed mainly of rock and metal, while comets are made of ice and rock. Asteroids tend to have near-circular orbits that lie in the plane of the solar system. Com ...
doc - Jnoodle
... The constant in Wien's displacement law is usually called "the constant in Wien's displacement law" or sometimes for short "Wien's constant" and should be assigned units: 2.90 x 103 Km (kelvinmeters). It is rarely given any symbol, but one can be assigned to it at will. This law means that the hotte ...
... The constant in Wien's displacement law is usually called "the constant in Wien's displacement law" or sometimes for short "Wien's constant" and should be assigned units: 2.90 x 103 Km (kelvinmeters). It is rarely given any symbol, but one can be assigned to it at will. This law means that the hotte ...
Meteorites and the Early Solar System
... Ordinary chondrites are the most common type of stone meteorite. All chondrites contain chondrules, small spherical inclusions. Ordinary chondrites are further grouped by H, L and LL classifications, indicating iron content, and by the numbers 3-7, indicating the amount of change or metamorphism in ...
... Ordinary chondrites are the most common type of stone meteorite. All chondrites contain chondrules, small spherical inclusions. Ordinary chondrites are further grouped by H, L and LL classifications, indicating iron content, and by the numbers 3-7, indicating the amount of change or metamorphism in ...
www.astro.org.uk www.facebook.com/Stra ordAstro www.twi er.com
... that had been hovering in the sun's atmosphere erupted out into space. Baker says that this might have caused the shock wave that led to the forma:on of the third ring a few days later. In addi:on, the new belt was virtually annihilated four weeks aNer it appeared by another powerful interplanetary ...
... that had been hovering in the sun's atmosphere erupted out into space. Baker says that this might have caused the shock wave that led to the forma:on of the third ring a few days later. In addi:on, the new belt was virtually annihilated four weeks aNer it appeared by another powerful interplanetary ...
Mass and the Properties of Main Sequence Stars
... neutrons, and releasing neutrinos and energy at the same time Supernova explosion. Eventually the neutron degeneracy pressure will balance the gravitational pressure (if the star is not too massive) to form a neutron star. The estimated of the neutron stars are about 10 km in diameter, with a mass ...
... neutrons, and releasing neutrinos and energy at the same time Supernova explosion. Eventually the neutron degeneracy pressure will balance the gravitational pressure (if the star is not too massive) to form a neutron star. The estimated of the neutron stars are about 10 km in diameter, with a mass ...
Solstice vs Equinox
... If you plan to read more on this topic, the following terms may help you: (solar) altitude: the height of the sun relative to the horizon autumnal equinox: a brief period when day and night are basically equal in duration,on or around September 23 axial tilt: the number of degrees the Earth leans to ...
... If you plan to read more on this topic, the following terms may help you: (solar) altitude: the height of the sun relative to the horizon autumnal equinox: a brief period when day and night are basically equal in duration,on or around September 23 axial tilt: the number of degrees the Earth leans to ...
Comparison of Precession Theories: An
... was Sir Isaac Newton, who had just developed his theories of gravity that said if the Earth did wobble it must be due to the mass of the Sun and the Moon, the only bodies considered close enough or large enough to have such an effect. But Newton’s equations never did match observed precession rates. ...
... was Sir Isaac Newton, who had just developed his theories of gravity that said if the Earth did wobble it must be due to the mass of the Sun and the Moon, the only bodies considered close enough or large enough to have such an effect. But Newton’s equations never did match observed precession rates. ...
an Educator`s GuidE - Museum of Science, Boston
... line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting life, scientists target rocky, terrestrial worlds, but they are not always hospitable. Take t ...
... line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting life, scientists target rocky, terrestrial worlds, but they are not always hospitable. Take t ...
an Educator`s GuidE
... line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting life, scientists target rocky, terrestrial worlds, but they are not always hospitable. Take t ...
... line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting life, scientists target rocky, terrestrial worlds, but they are not always hospitable. Take t ...
Latest SpaceX Launch Last Class Clicker Question: Saturn`s Rings
... magnetospheres, but Jupiter's is the largest by far. video ...
... magnetospheres, but Jupiter's is the largest by far. video ...
Lecture
... • Cold (red ones) stars have longer lifetime than hot stars: – O star: ~ 1 million years – G star (Sun): ~ 10 billion years – M star : ~ 5,000 billion years ...
... • Cold (red ones) stars have longer lifetime than hot stars: – O star: ~ 1 million years – G star (Sun): ~ 10 billion years – M star : ~ 5,000 billion years ...
10. Atmospheres of Planets and of Exoplanets - ETH E
... Chapter 2). Our Atmosphere is able to bear heavy elements as Argon (Ar); light elements such as hydrogen (H2) and Helium (He) have been lost during its development. • As Venus, the Planet Mars has a CO2- Atmosphere. The largest part of its Atmosphere has probably been strippt off by the solar wind a ...
... Chapter 2). Our Atmosphere is able to bear heavy elements as Argon (Ar); light elements such as hydrogen (H2) and Helium (He) have been lost during its development. • As Venus, the Planet Mars has a CO2- Atmosphere. The largest part of its Atmosphere has probably been strippt off by the solar wind a ...
Notes (PowerPoint)
... • Pluto discovered 1930, orbit radius ~30 AU • Five new candidate planets since 2002 (see next slide) • Definition of a planet is in dispute. Also casts doubt on whether or not Pluto is a planet • Newest (Xena) may have the best claim – size, moon • These are in or near the “Kuiper Belt” (asteroids) ...
... • Pluto discovered 1930, orbit radius ~30 AU • Five new candidate planets since 2002 (see next slide) • Definition of a planet is in dispute. Also casts doubt on whether or not Pluto is a planet • Newest (Xena) may have the best claim – size, moon • These are in or near the “Kuiper Belt” (asteroids) ...
Chapter 10
... 3. Describe the appearance of Jupiter’s surface and explain the belts and zones and the Great Red Spot. 4. Describe the interior of Jupiter and draw a labeled sketch of a cross section through Jupiter. 5. Be able to identify by sight, and to describe the Galilean satellites of Jupiter, including the ...
... 3. Describe the appearance of Jupiter’s surface and explain the belts and zones and the Great Red Spot. 4. Describe the interior of Jupiter and draw a labeled sketch of a cross section through Jupiter. 5. Be able to identify by sight, and to describe the Galilean satellites of Jupiter, including the ...
Chapter-by-Chapter Guide
... the farther away they are located, the faster they are moving away. While at first this might seem to suggest that we are at the center of the universe, a little more reflection indicates that this is not the case. If we imagine a raisin cake rising, we can see that every raisin will move away from ...
... the farther away they are located, the faster they are moving away. While at first this might seem to suggest that we are at the center of the universe, a little more reflection indicates that this is not the case. If we imagine a raisin cake rising, we can see that every raisin will move away from ...
Lecture12
... • The luminosity of Cepheid stars increases with their period. Hence they are useful indicators of distance. ...
... • The luminosity of Cepheid stars increases with their period. Hence they are useful indicators of distance. ...
Lecture notes
... Schönberg and Chandrasekhar determined the constant to be 0.37, and if the envelope has a solar composition and the core consists of helium we have that µenv = 0.6 and µc = 1, which gives us Mc /M ≤ 0.13. As the core mass exceeds this value the core contracts rapidly. For stars larger than 2M the ...
... Schönberg and Chandrasekhar determined the constant to be 0.37, and if the envelope has a solar composition and the core consists of helium we have that µenv = 0.6 and µc = 1, which gives us Mc /M ≤ 0.13. As the core mass exceeds this value the core contracts rapidly. For stars larger than 2M the ...
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.