Physics 20 Lesson 23 Orbits and Satellites
... As the speed of the horizontal projectile is increased, it will land further and further away from the starting point. For a flat Earth the projectile would always hit the ground; no matter how fast the projectile went, gravity would pull it down to the ground. However, since the Earth is round, the ...
... As the speed of the horizontal projectile is increased, it will land further and further away from the starting point. For a flat Earth the projectile would always hit the ground; no matter how fast the projectile went, gravity would pull it down to the ground. However, since the Earth is round, the ...
Stellar Classification and Evolution What is a star? A cloud of gas
... (which actually has nothing to do with planets, but we didn’t know that in the 18th century when Herschel coined the term) The core _____________________ to form a White Dwarf ...
... (which actually has nothing to do with planets, but we didn’t know that in the 18th century when Herschel coined the term) The core _____________________ to form a White Dwarf ...
Gravity
... The distance of the star Vega from Earth is 1.6 million times greater than the distance from the sun to the Earth. Which of the following best describes the gravitational influence of Vega on Earth? 1. It is roughly equal to that of the sun. 2. Its influence is greater than that of the sun. 3. Its ...
... The distance of the star Vega from Earth is 1.6 million times greater than the distance from the sun to the Earth. Which of the following best describes the gravitational influence of Vega on Earth? 1. It is roughly equal to that of the sun. 2. Its influence is greater than that of the sun. 3. Its ...
Dwarf Planets
... Two planets circle the sun in the twilight beyond Saturn. You will find Uranus and Neptune strangely different from Jupiter and Saturn, but recognizable as planets. As you explore you will also discover a family of dwarf planets, which includes Pluto, which will give you important clues to the origi ...
... Two planets circle the sun in the twilight beyond Saturn. You will find Uranus and Neptune strangely different from Jupiter and Saturn, but recognizable as planets. As you explore you will also discover a family of dwarf planets, which includes Pluto, which will give you important clues to the origi ...
Solar system - Wikimedia Commons
... direct contact into clumps between one and ten metres in diameter; then collided to form larger bodies (planetesimals) of roughly 5 km in size; then gradually increased by further collisions at roughly 15 cm per year over the course of the next few million years.[21] The inner Solar System was too w ...
... direct contact into clumps between one and ten metres in diameter; then collided to form larger bodies (planetesimals) of roughly 5 km in size; then gradually increased by further collisions at roughly 15 cm per year over the course of the next few million years.[21] The inner Solar System was too w ...
Comments from John Saunders.
... Alpha being the brightest) what we don’t realise is that Alpha Centauri is actually a double or binary star. In other words, it is not one but two stars and they rotate around each others centre of gravity every 80 years and separated from each other by 3.75 billion km’s (25 AU) Although the Kepler ...
... Alpha being the brightest) what we don’t realise is that Alpha Centauri is actually a double or binary star. In other words, it is not one but two stars and they rotate around each others centre of gravity every 80 years and separated from each other by 3.75 billion km’s (25 AU) Although the Kepler ...
Cosmic Distance Ladder
... • Different orbital positions of the Earth causes nearby stars to appear to move relative to the more distant stars. • The annual parallax is defined as the difference in position of a star as seen from the Earth and Sun, i.e. the angle subtended at a star by the mean radius of the Earth's orbit aro ...
... • Different orbital positions of the Earth causes nearby stars to appear to move relative to the more distant stars. • The annual parallax is defined as the difference in position of a star as seen from the Earth and Sun, i.e. the angle subtended at a star by the mean radius of the Earth's orbit aro ...
here
... 26) Why did Ptolemy have the planets orbiting Earth on "circles upon circles" in his model of the universe? A) to explain the fact that planets sometimes appear to move westward, rather than eastward, relative to the stars in our sky B) to explain why more distant planets take longer to make a circu ...
... 26) Why did Ptolemy have the planets orbiting Earth on "circles upon circles" in his model of the universe? A) to explain the fact that planets sometimes appear to move westward, rather than eastward, relative to the stars in our sky B) to explain why more distant planets take longer to make a circu ...
Stages in the Life of a Star
... Assume that all stars in cluster form at about the same time. Stars slightly heavier than turnoff have already evolved away from main sequence. ...
... Assume that all stars in cluster form at about the same time. Stars slightly heavier than turnoff have already evolved away from main sequence. ...
The Sky This Month
... Saturn – mag 0.4 • Look to the south before dawn. • Rises later over the course of the month. • Tougher to see when it rises later due to the rising sun. ...
... Saturn – mag 0.4 • Look to the south before dawn. • Rises later over the course of the month. • Tougher to see when it rises later due to the rising sun. ...
Lecture 2 Abundances
... • Elements with differences greater than 25% (Table 5, Lodders 2009) are W (2.76), Ag (0.52), Cl (1.79), Rb(1.64), Ga (0.61), Au(1.54). Tl (1.43), Hf (1.43), and F (1.32). Some, like Au, Hf, Mn, and W have uncertain oscillator strengths and problems with line blending. Others, like Cl, Ga, and Rb ar ...
... • Elements with differences greater than 25% (Table 5, Lodders 2009) are W (2.76), Ag (0.52), Cl (1.79), Rb(1.64), Ga (0.61), Au(1.54). Tl (1.43), Hf (1.43), and F (1.32). Some, like Au, Hf, Mn, and W have uncertain oscillator strengths and problems with line blending. Others, like Cl, Ga, and Rb ar ...
Isaac Newton and the Laws of Motion and Gravitation 2
... – On March 13, 1781 while he was looking for double stars with his telescope in the constellation Gemini, he saw a star appeared like a fuzzy disk rather than a point. – He initially thought it was a comet. But subsequent observation by him and others indicated that it was a planet, located beyond S ...
... – On March 13, 1781 while he was looking for double stars with his telescope in the constellation Gemini, he saw a star appeared like a fuzzy disk rather than a point. – He initially thought it was a comet. But subsequent observation by him and others indicated that it was a planet, located beyond S ...
Second Semester Study Guide
... 25. What conclusion can be drawn from the fact that some planets with solid surfaces and satellites have impact craters? A. Collisions between Solar System bodies and planetesimals were common at one time. B. The young planets had softer surfaces. C. Volcanoes were very active in the early stages of ...
... 25. What conclusion can be drawn from the fact that some planets with solid surfaces and satellites have impact craters? A. Collisions between Solar System bodies and planetesimals were common at one time. B. The young planets had softer surfaces. C. Volcanoes were very active in the early stages of ...
Spring 2014 Astronomy Exam Study Guide (Co-Taught)
... 6. How does Einstein’s concept of gravity differ from Newton’s concept of gravity? 7. Is there a center to the Universe? If so, where is it? 8. What is a light year a measure of? 9. Our Sun obtains its energy through nuclear fusion. Which of the following elements are primarily involved in this reac ...
... 6. How does Einstein’s concept of gravity differ from Newton’s concept of gravity? 7. Is there a center to the Universe? If so, where is it? 8. What is a light year a measure of? 9. Our Sun obtains its energy through nuclear fusion. Which of the following elements are primarily involved in this reac ...
5.3 Most objects in the solar system are in a regular and predictable
... 1. The sun, Earth and its moon are spherical objects that move in two ways: they spin (rotate) and they change positions relative to each other (revolve). 2. The sun is a star that produces light that travels in straight lines away from the sun in all directions. Light from the sun illuminates objec ...
... 1. The sun, Earth and its moon are spherical objects that move in two ways: they spin (rotate) and they change positions relative to each other (revolve). 2. The sun is a star that produces light that travels in straight lines away from the sun in all directions. Light from the sun illuminates objec ...
SES4U Distance Calculation Practice 1 light year = 9.46 x 1015
... 5. Neptune is 4,487,936,120.73 km away from the Sun. What is this distance in AU? (ANS: 30 AU) 6. The largest moon of Saturn, Titan, is Saturn's only moon to have a dense atmosphere. If Titan's semi major axis is 1,221,870 km, how long would it take light to travel from titan to Saturn's surface? (A ...
... 5. Neptune is 4,487,936,120.73 km away from the Sun. What is this distance in AU? (ANS: 30 AU) 6. The largest moon of Saturn, Titan, is Saturn's only moon to have a dense atmosphere. If Titan's semi major axis is 1,221,870 km, how long would it take light to travel from titan to Saturn's surface? (A ...
March 5, 2017
... Since I brought up Pluto, a little history. Pluto was the last “planet” and first Kuiper Belt object discovered. The Kuiper Belt is a ring of objects outside the orbit of Neptune. It is like the asteroid belt between Mars and Jupiter, but contains larger bodies, like Pluto! Pluto was discovered by C ...
... Since I brought up Pluto, a little history. Pluto was the last “planet” and first Kuiper Belt object discovered. The Kuiper Belt is a ring of objects outside the orbit of Neptune. It is like the asteroid belt between Mars and Jupiter, but contains larger bodies, like Pluto! Pluto was discovered by C ...
Celestial Motions - Georgia State University
... 1. Stars are so far away that stellar parallax is too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away ...
... 1. Stars are so far away that stellar parallax is too small to notice with the naked eye 2. Earth does not orbit Sun; it is the center of the universe With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away ...
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.