Name
... • σ = 5.7 x 10-8 W/(m2-K4) • 1 parsec = 3.26 light years 1) In the sky, you follow an object as it passes through the constellations Leo, Hydra, and Canis Major. What can you say about this object? A) This object is one of the nine planets. B) This object will collide with the sun. C) This object is ...
... • σ = 5.7 x 10-8 W/(m2-K4) • 1 parsec = 3.26 light years 1) In the sky, you follow an object as it passes through the constellations Leo, Hydra, and Canis Major. What can you say about this object? A) This object is one of the nine planets. B) This object will collide with the sun. C) This object is ...
hwk08
... 2. This problem concerns energy release by various forms of nuclear burning in a massive star. A star with mass M = 10 M sun begins with luminosity L 4000 L sun , brightens unsteadily as it evolves, and eventually reaches L 25000 L sun just before it becomes a supernova. (Meanwhile, earlier type ...
... 2. This problem concerns energy release by various forms of nuclear burning in a massive star. A star with mass M = 10 M sun begins with luminosity L 4000 L sun , brightens unsteadily as it evolves, and eventually reaches L 25000 L sun just before it becomes a supernova. (Meanwhile, earlier type ...
Homework problems for Quiz 2: AY5 Spring 2013
... 3. In the fusion of four protons into helium, 4.7 × 10−26 grams of matter is turned into energy. How much energy does this amount of matter produce? E=∆mc2 = (4.7 × 10−26 ) × (3 × 1010 )2 grams-cm2 /sec2 (erg)= 42.3 × 10−6 ergs 4. How long will a 4M star with L = 5000L spend on the main-sequence? ...
... 3. In the fusion of four protons into helium, 4.7 × 10−26 grams of matter is turned into energy. How much energy does this amount of matter produce? E=∆mc2 = (4.7 × 10−26 ) × (3 × 1010 )2 grams-cm2 /sec2 (erg)= 42.3 × 10−6 ergs 4. How long will a 4M star with L = 5000L spend on the main-sequence? ...
Sun - Astronomy Outreach
... coronal mass ejections (CMEs) take a different route. They are created when magnetic field lines form a bubble. They cut loose from the Sun, dragging with them the solar plasma. CME seen from one of SOHO’s coronographs. ...
... coronal mass ejections (CMEs) take a different route. They are created when magnetic field lines form a bubble. They cut loose from the Sun, dragging with them the solar plasma. CME seen from one of SOHO’s coronographs. ...
Astronomy Terms
... explosion of concentrated matter and energy and has been expanding ever since Copernicus = Polish astronomer who first stated the theory that Earth and other planets revolve around the sun Light-year = the distance that light travels in one year Gravity = force of attraction between objects Orbits = ...
... explosion of concentrated matter and energy and has been expanding ever since Copernicus = Polish astronomer who first stated the theory that Earth and other planets revolve around the sun Light-year = the distance that light travels in one year Gravity = force of attraction between objects Orbits = ...
Sun - International Year of Astronomy 2009
... coronal mass ejections (CMEs) take a different route. They are created when magnetic field lines form a bubble. They cut loose from the Sun, dragging with them the solar plasma. CME seen from one of SOHO’s coronographs. ...
... coronal mass ejections (CMEs) take a different route. They are created when magnetic field lines form a bubble. They cut loose from the Sun, dragging with them the solar plasma. CME seen from one of SOHO’s coronographs. ...
1700_orbits
... • Astronomers knew the relative distances of the planets, but not the absolute distances. • Known: Jupiter is 5 times farther from the Sun than the Earth is. It takes Jupiter 12 times longer to go around the Sun than it does for the Earth. • Not known: How many kilometers (or miles) are the Earth an ...
... • Astronomers knew the relative distances of the planets, but not the absolute distances. • Known: Jupiter is 5 times farther from the Sun than the Earth is. It takes Jupiter 12 times longer to go around the Sun than it does for the Earth. • Not known: How many kilometers (or miles) are the Earth an ...
SWFAS Sept 2016 Newsletter - Southwest Florida Astronomical
... discovered asteroids by their distance from the Sun, he noted several gaps, now named Kirkwood gaps in his honor, and associated these gaps with orbital resonances with the orbit of Jupiter. Further, Kirkwood also suggested a similar dynamic was responsible for Cassini Division in Saturn's rings, as ...
... discovered asteroids by their distance from the Sun, he noted several gaps, now named Kirkwood gaps in his honor, and associated these gaps with orbital resonances with the orbit of Jupiter. Further, Kirkwood also suggested a similar dynamic was responsible for Cassini Division in Saturn's rings, as ...
Chapter 14 Our Star The Sun is the Largest Object in the Solar
... atmosphere, is characterized by its high temperature and low density ...
... atmosphere, is characterized by its high temperature and low density ...
Stargazing Rules 01162013
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
Answer - Brock physics
... (a) the atmosphere goes walking about in an unfamiliar neighbourhood. (b) * its surface is too hot. (c) its surface is too cold. (d) the rate of chemical reactions in the atmosphere is too large. (e) the rate of chemical reactions in the atmosphere is too small. 69. The temperature of a planet is de ...
... (a) the atmosphere goes walking about in an unfamiliar neighbourhood. (b) * its surface is too hot. (c) its surface is too cold. (d) the rate of chemical reactions in the atmosphere is too large. (e) the rate of chemical reactions in the atmosphere is too small. 69. The temperature of a planet is de ...
Eratosthenes (250 B.C) Ptolemy`s Geocentric Model
... •definitive proof that the Earth orbited the sun, and spun on its axis (most of that due to Galileo—stay tuned! Missing: an explanation of Why the planets orbited the sun and why Kepler's mysterious laws NASA’s Project were true! Kepler—to detect terrestrial planets orbiting other stars! ...
... •definitive proof that the Earth orbited the sun, and spun on its axis (most of that due to Galileo—stay tuned! Missing: an explanation of Why the planets orbited the sun and why Kepler's mysterious laws NASA’s Project were true! Kepler—to detect terrestrial planets orbiting other stars! ...
The Sun
... elements. 3. Nuclear fission of hydrogen. 4. Nuclear fission of heavier elements into hydrogen. 5. Nuclear fission of heavier elements into elements heavier than hydrogen. ...
... elements. 3. Nuclear fission of hydrogen. 4. Nuclear fission of heavier elements into hydrogen. 5. Nuclear fission of heavier elements into elements heavier than hydrogen. ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 3
... is a few times kT /h. (iv) Thus show that the Rosseland mean opacity for free-free absorption obeys Kramers law where κ ∝ ρT −3.5 . ...
... is a few times kT /h. (iv) Thus show that the Rosseland mean opacity for free-free absorption obeys Kramers law where κ ∝ ρT −3.5 . ...
The Sun
... • Magnetic fields cause splitting of spectral lines, allows us to measure them in the Universe – Zeeman Effect • Sunspots; high magnetic fields trap gas on photospheric surface, where it cools. • Photosphere is the coolest layer of the sun • Corona heated by magnetic field energy to ~million degrees ...
... • Magnetic fields cause splitting of spectral lines, allows us to measure them in the Universe – Zeeman Effect • Sunspots; high magnetic fields trap gas on photospheric surface, where it cools. • Photosphere is the coolest layer of the sun • Corona heated by magnetic field energy to ~million degrees ...
Slide 1
... Kelvin cooler than the average temperature on the photosphere. This makes them appear to be dark in comparison to their very bright surroundings. Following long-lived sunspots through time allows one to determine the rotation rate of the Sun. It turns out that the Sun spins faster at the equator tha ...
... Kelvin cooler than the average temperature on the photosphere. This makes them appear to be dark in comparison to their very bright surroundings. Following long-lived sunspots through time allows one to determine the rotation rate of the Sun. It turns out that the Sun spins faster at the equator tha ...
ASTR100 (Spring 2008) Introduction to Astronomy Our Star
... neutrinos, but some have changed form. ...
... neutrinos, but some have changed form. ...
Name
... D) are not electromagnetic waves like visible light is. E) have less energy per photon An infrared photon has a frequency of 1 x 1014 Hz. What is the energy of this ...
... D) are not electromagnetic waves like visible light is. E) have less energy per photon An infrared photon has a frequency of 1 x 1014 Hz. What is the energy of this ...
Name - MIT
... 6) A planet is 4 Astronomical Units from the Sun. What is the planet’s orbital period around the Sun? A) the square of 4, which equals 16 years B) the square root of 4, which equals 2 years C) the square root of 64, which equals 8 years D) the square of 9, which equals 81 years E) the cube of 4, whi ...
... 6) A planet is 4 Astronomical Units from the Sun. What is the planet’s orbital period around the Sun? A) the square of 4, which equals 16 years B) the square root of 4, which equals 2 years C) the square root of 64, which equals 8 years D) the square of 9, which equals 81 years E) the cube of 4, whi ...
(Earth-like) planets
... Terrestrial (Earth-like) planets: Mercury, Venus, Earth, Mars. Rocky, with relatively thin atmospheres (compared to the size of the planet). Much remaining evidence of bombardment by asteroids and meteors. Contain live volcanoes or evidence of past lava flows. Few moons. Jovian (Jupiter-like) planet ...
... Terrestrial (Earth-like) planets: Mercury, Venus, Earth, Mars. Rocky, with relatively thin atmospheres (compared to the size of the planet). Much remaining evidence of bombardment by asteroids and meteors. Contain live volcanoes or evidence of past lava flows. Few moons. Jovian (Jupiter-like) planet ...
The New Dwarf Planet and Plutoids
... our solar system. The definition for planets has changed and there are now dwarf planets and plutoids. In 2006 leading astronomers redefined the word planet. A planet is now defined as a large celestial body orbiting a star. It is nearly round, has its own gravity, and must clear the neighborhood ar ...
... our solar system. The definition for planets has changed and there are now dwarf planets and plutoids. In 2006 leading astronomers redefined the word planet. A planet is now defined as a large celestial body orbiting a star. It is nearly round, has its own gravity, and must clear the neighborhood ar ...
The student will understand the hierarchical relationships of objects
... Recognize that there are enormous distances between objects in space. Explain how the speed of light is used to measure distance in space. Explain how astronomical bodies close to Earth are measured in AU units (distance between the Sun and Earth). Recognize that the universe contains many billions ...
... Recognize that there are enormous distances between objects in space. Explain how the speed of light is used to measure distance in space. Explain how astronomical bodies close to Earth are measured in AU units (distance between the Sun and Earth). Recognize that the universe contains many billions ...
Chapter 6
... orbiting it • Asteroids are rocky, and most orbit between orbits of Mars and Jupiter • Comets are icy and are believed to have formed early in the solar system’s life • Major planets orbit Sun in same sense, and all but Venus rotate in that sense as well • Planetary orbits lie almost in the same pla ...
... orbiting it • Asteroids are rocky, and most orbit between orbits of Mars and Jupiter • Comets are icy and are believed to have formed early in the solar system’s life • Major planets orbit Sun in same sense, and all but Venus rotate in that sense as well • Planetary orbits lie almost in the same pla ...
Testing - School District of Lomira
... • The sunspot cycle, or the variation in the number of sunspots on the Sun’s surface,has an average period of 11 years.The magnetic field flip-flops every 11 years or so, resulting in a 22-year magnetic cycle. ...
... • The sunspot cycle, or the variation in the number of sunspots on the Sun’s surface,has an average period of 11 years.The magnetic field flip-flops every 11 years or so, resulting in a 22-year magnetic cycle. ...
Solar System
The Solar System comprises the Sun and the planetary system that orbits it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies such as comets and asteroids. Of those that orbit the Sun indirectly, two are larger than the smallest planet.The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed largely of substances with relatively high melting points compared with hydrogen and helium, called ices, such as water, ammonia and methane. All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic.The Solar System also contains smaller objects. The asteroid belt, which lies between Mars and Jupiter, mostly contains objects composed, like the terrestrial planets, of rock and metal. Beyond Neptune's orbit lie the Kuiper belt and scattered disc, populations of trans-Neptunian objects composed mostly of ices, and beyond them a newly discovered population of sednoids. Within these populations are several dozen to possibly tens of thousands of objects large enough to have been rounded by their own gravity. Such objects are categorized as dwarf planets. Identified dwarf planets include the asteroid Ceres and the trans-Neptunian objects Pluto and Eris. In addition to these two regions, various other small-body populations, including comets, centaurs and interplanetary dust, freely travel between regions. Six of the planets, at least three of the dwarf planets, and many of the smaller bodies are orbited by natural satellites, usually termed ""moons"" after the Moon. Each of the outer planets is encircled by planetary rings of dust and other small objects.The solar wind, a stream of charged particles flowing outwards from the Sun, creates a bubble-like region in the interstellar medium known as the heliosphere. The heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of interstellar wind; it extends out to the edge of the scattered disc. The Oort cloud, which is believed to be the source for long-period comets, may also exist at a distance roughly a thousand times further than the heliosphere. The Solar System is located in the Orion Arm, 26,000 light-years from the center of the Milky Way.