Chapter 09
... Note that the following lectures include animations and PowerPoint effects such as ...
... Note that the following lectures include animations and PowerPoint effects such as ...
Solar Magnetism and Solar Cycle
... stretching, twisting, and folding of the field lines that results from the combined effects of differential rotation and convection. • This theory is called solar dynamo, which predicts that the Sun’s magnetic field should rise to a maximum, then fall to zero and reverse itself in a more-or-less pe ...
... stretching, twisting, and folding of the field lines that results from the combined effects of differential rotation and convection. • This theory is called solar dynamo, which predicts that the Sun’s magnetic field should rise to a maximum, then fall to zero and reverse itself in a more-or-less pe ...
NJIT Physics 320: Astronomy and Astrophysics
... Heliocentric planetary model: The Sun is at the center of all planetary motions, except for the Moon which orbits Earth. Under this arrangement the orbital speed of planets decreases steadily outwards, and the outer sphere of fixed stars is truly motionless. In Copernicus' original model the Earth h ...
... Heliocentric planetary model: The Sun is at the center of all planetary motions, except for the Moon which orbits Earth. Under this arrangement the orbital speed of planets decreases steadily outwards, and the outer sphere of fixed stars is truly motionless. In Copernicus' original model the Earth h ...
EarthComm_c1s3
... There are arguments against the steady-state theory. They include the discovery of the cosmic background radiation. As you read earlier, this radiation indicates that the universe did have a beginning. Just after the big bang, all that existed in the universe was energy. As the universe expanded, it ...
... There are arguments against the steady-state theory. They include the discovery of the cosmic background radiation. As you read earlier, this radiation indicates that the universe did have a beginning. Just after the big bang, all that existed in the universe was energy. As the universe expanded, it ...
The Planets - Guild of Students
... Temperature variations on Mercury are the most extreme in the solar system ranging from 90 K to 700 K. The temperature on Venus is slightly hotter but very stable. Mercury is in many ways similar to the Moon: its surface is heavily cratered and very old; it has no plate tectonics. On the other hand, ...
... Temperature variations on Mercury are the most extreme in the solar system ranging from 90 K to 700 K. The temperature on Venus is slightly hotter but very stable. Mercury is in many ways similar to the Moon: its surface is heavily cratered and very old; it has no plate tectonics. On the other hand, ...
p35-KIDS_Layout 1
... of tidal acceleration. It will eventually be torn apart, in about 3.6 billion years, when it reaches the Roche limit. In 1989, Triton was the coldest object that had yet been measured in the Solar System, with estimated temperatures of ?235 ∞C. Neptune’s second known satellite (by order of discovery ...
... of tidal acceleration. It will eventually be torn apart, in about 3.6 billion years, when it reaches the Roche limit. In 1989, Triton was the coldest object that had yet been measured in the Solar System, with estimated temperatures of ?235 ∞C. Neptune’s second known satellite (by order of discovery ...
Coordinates - Naval Postgraduate School
... with period of 26,000 years. The rotation axis points almost at the star Polaris now, but in 14,000 years will point at Vega. This is called the precision or precision of the equinox. In addition there is a smaller oscillation with a period of 18.6 years due to the moon. This is called nutation. The ...
... with period of 26,000 years. The rotation axis points almost at the star Polaris now, but in 14,000 years will point at Vega. This is called the precision or precision of the equinox. In addition there is a smaller oscillation with a period of 18.6 years due to the moon. This is called nutation. The ...
Precession of Earth
... is the result of Precession. Since by definition the North Star is the star most closely aligned with the earth's axis, as the axis moves the nearest star changes too. Precession is the change in the direction of the axis, but without any change in tilt; changes the stars near the Pole; It does not ...
... is the result of Precession. Since by definition the North Star is the star most closely aligned with the earth's axis, as the axis moves the nearest star changes too. Precession is the change in the direction of the axis, but without any change in tilt; changes the stars near the Pole; It does not ...
CosmologyL1
... Our star, the Sun belongs to a vast formation of stars called Milky Way Galaxy. When we receive light or radio waves across our galaxy, it takes them tens of thousands years to reach us. Andromeda, one of our nearest neighbour galaxies is 2 million ly from Earth (the furthest object you can see with ...
... Our star, the Sun belongs to a vast formation of stars called Milky Way Galaxy. When we receive light or radio waves across our galaxy, it takes them tens of thousands years to reach us. Andromeda, one of our nearest neighbour galaxies is 2 million ly from Earth (the furthest object you can see with ...
Ch. 27
... Because the outer planets are far from the sun, they are much colder. This allowed them to keep their lighter gasses, plus their accumulated the gasses that ...
... Because the outer planets are far from the sun, they are much colder. This allowed them to keep their lighter gasses, plus their accumulated the gasses that ...
Observational Constraints The Nebular Hypothesis
... 1. Small dust grains grow into larger—but still relatively small—asteroid-like bodies called planetesimals. 2. Planetesimals repeated crash into each other, resulting in increasingly large planetesimals. Some of these objects grow large enough to be called protoplanets. 3. As the protoplanets grow t ...
... 1. Small dust grains grow into larger—but still relatively small—asteroid-like bodies called planetesimals. 2. Planetesimals repeated crash into each other, resulting in increasingly large planetesimals. Some of these objects grow large enough to be called protoplanets. 3. As the protoplanets grow t ...
proposed path of the missing planet
... Galactic and Earth ecliptic planes within the celestial sphere While there is “proper motion” (change in position of the stars relative to each other as seen on the celestial surroundings from Earth), the star field as a whole is far more relatively stable than the ever changing Earth projected grid ...
... Galactic and Earth ecliptic planes within the celestial sphere While there is “proper motion” (change in position of the stars relative to each other as seen on the celestial surroundings from Earth), the star field as a whole is far more relatively stable than the ever changing Earth projected grid ...
SECTION 30.2 Measuring the Stars 1. Constellations are a. the
... d. found only in the northern hemisphere. 2. Ursa Major, or the big dipper, is an example of a a. circumpolar constellation. b. constellation that can be seen only in winter. c. constellation that can be seen only in summer. d. constellation that can be seen only in the fall. 3. Scientists measure d ...
... d. found only in the northern hemisphere. 2. Ursa Major, or the big dipper, is an example of a a. circumpolar constellation. b. constellation that can be seen only in winter. c. constellation that can be seen only in summer. d. constellation that can be seen only in the fall. 3. Scientists measure d ...
CHAPTER
... the Earth was in a molten state. That’s when the heavier elements would have sunk through the less dense material. Scientists understand as much as they do about the structure of the Earth because of what they have learned from studying the waves that result from earthquakes. These waves travel thro ...
... the Earth was in a molten state. That’s when the heavier elements would have sunk through the less dense material. Scientists understand as much as they do about the structure of the Earth because of what they have learned from studying the waves that result from earthquakes. These waves travel thro ...
Astronomy 12 - hrsbstaff.ednet.ns.ca
... (ii) The Sun's principal reaction is the proton-proton (p-p) chain reaction, in which 4 hydrogen atoms (protons) are converted into a 4-He nucleus (alpha particle). Each p-p reaction releases 4.2x10-12 Joules of energy. Use this number and the luminosity of the Sun to calculate how many p-p reaction ...
... (ii) The Sun's principal reaction is the proton-proton (p-p) chain reaction, in which 4 hydrogen atoms (protons) are converted into a 4-He nucleus (alpha particle). Each p-p reaction releases 4.2x10-12 Joules of energy. Use this number and the luminosity of the Sun to calculate how many p-p reaction ...
Jan 2015 - Bluewater Astronomical Society
... many BAS members who have seen it and even a few of my neighbours have had Mercury pointed out to them. (Heck, sometimes, even complete strangers, get coerced into looking...) Mercury’s elusive reputation may be undeserved because it can be seen easily if you know when to look. Mercury needs to be a ...
... many BAS members who have seen it and even a few of my neighbours have had Mercury pointed out to them. (Heck, sometimes, even complete strangers, get coerced into looking...) Mercury’s elusive reputation may be undeserved because it can be seen easily if you know when to look. Mercury needs to be a ...
National Round Questions 2014
... about the same as the earth's b) about 100 times as great as the earth's c) about 1/200th that of the earth's d) half as much as that of the earth's 50. A comet's tail points in which direction? a) toward the sun b) toward the earth c) behind the comet in its orbit d) away from the sun 51.Which of t ...
... about the same as the earth's b) about 100 times as great as the earth's c) about 1/200th that of the earth's d) half as much as that of the earth's 50. A comet's tail points in which direction? a) toward the sun b) toward the earth c) behind the comet in its orbit d) away from the sun 51.Which of t ...
ABC`s of the Sky - Northern Stars Planetarium
... Orbit An orbit is the path a planet follows as it moves around the Sun. Spacecraft like the Space Shuttle also travel in an orbit as they fly around the Earth. Planet Planets are large objects that orbit around stars. The Sun has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, a ...
... Orbit An orbit is the path a planet follows as it moves around the Sun. Spacecraft like the Space Shuttle also travel in an orbit as they fly around the Earth. Planet Planets are large objects that orbit around stars. The Sun has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, a ...
The Origins of Astronomy: Prehistoric Peoples
... However, parallax was not observed. Aristotle offered several proofs that the earth was a sphere. One such proof involved lunar eclipses. During Aristotle’s time, it was known that lunar eclipses were caused by the shadow of the earth falling on the moon. The fact that the shadow was always circular ...
... However, parallax was not observed. Aristotle offered several proofs that the earth was a sphere. One such proof involved lunar eclipses. During Aristotle’s time, it was known that lunar eclipses were caused by the shadow of the earth falling on the moon. The fact that the shadow was always circular ...
L3-January 15/08
... Ancient Greek Astronomy Aristarchus of Samos Measured the relative distances of the Moon and Sun and found the Sun was 18-20 times further away then the Moon Determined relative sizes of Earth, Moon, and Sun from lunar eclipse data (Moon diameter= 1/3 × Earth, Sun ...
... Ancient Greek Astronomy Aristarchus of Samos Measured the relative distances of the Moon and Sun and found the Sun was 18-20 times further away then the Moon Determined relative sizes of Earth, Moon, and Sun from lunar eclipse data (Moon diameter= 1/3 × Earth, Sun ...
Stars, Constellations, and the Celestial Sphere
... The stars of the dipper asterism in Ursa Major are a notable exception to this rule. They are named in alphabetical order, beginning with a at the upper right edge of the bowl of the dipper. The brightest of these stars is actually e Ursae Majoris. The brightness of a star is usually expressed in te ...
... The stars of the dipper asterism in Ursa Major are a notable exception to this rule. They are named in alphabetical order, beginning with a at the upper right edge of the bowl of the dipper. The brightest of these stars is actually e Ursae Majoris. The brightness of a star is usually expressed in te ...
Your Star: _____________________ Write down the wavelength at which the one
... of some of the well-known stars to calculate, using the formulas and methods discussed in class, their intrinsic properties (temperature, luminosity, and radius.) We will then look for patterns in these properties by way of the H-R (temperature-luminosity) diagram. Your group will be in charge of a ...
... of some of the well-known stars to calculate, using the formulas and methods discussed in class, their intrinsic properties (temperature, luminosity, and radius.) We will then look for patterns in these properties by way of the H-R (temperature-luminosity) diagram. Your group will be in charge of a ...