Center for Origins Studies: CalSpace
... Erastothenes (276-194 BC): If the Sun is much farther away, its rays arrives on parallel lines. Anaxagoras’s problem is then given by the bottom diagram. Alexandria lies north of Syene by a latitude angle arctan(1/8) = 7.2o = 360o/50. Distance from Alexandria to Syene, 800 km, is 1/50 of the polar c ...
... Erastothenes (276-194 BC): If the Sun is much farther away, its rays arrives on parallel lines. Anaxagoras’s problem is then given by the bottom diagram. Alexandria lies north of Syene by a latitude angle arctan(1/8) = 7.2o = 360o/50. Distance from Alexandria to Syene, 800 km, is 1/50 of the polar c ...
Slide 1
... 2. Jupiter’s moons and motions 3. “Full” phases of Venus None of these made sense in geocentric model, but they were all perfectly OK in Copernicus’ universe. The phases of Venus are especially decisive. ...
... 2. Jupiter’s moons and motions 3. “Full” phases of Venus None of these made sense in geocentric model, but they were all perfectly OK in Copernicus’ universe. The phases of Venus are especially decisive. ...
A Sense of Scale - Young Scientists Journal
... Our next step up takes us to subgiant stars. These stars are in the process of swelling up to giant stars, which usually takes a few tens or hundreds of millions of years. Subgiants normally start at just a few times the diameter of the Sun, but by the time they are fully converted to giant stars ar ...
... Our next step up takes us to subgiant stars. These stars are in the process of swelling up to giant stars, which usually takes a few tens or hundreds of millions of years. Subgiants normally start at just a few times the diameter of the Sun, but by the time they are fully converted to giant stars ar ...
Keplerian Motion
... • Ellipse – a squashed circle • Major axis of an ellipse – line which divides it into 2 parts • Minor axis of an ellipse – short axis or line ┴ to major axis which also ÷ ellipse into 2 equal but different parts • Center of ellipse – where major and minor axes cross ...
... • Ellipse – a squashed circle • Major axis of an ellipse – line which divides it into 2 parts • Minor axis of an ellipse – short axis or line ┴ to major axis which also ÷ ellipse into 2 equal but different parts • Center of ellipse – where major and minor axes cross ...
Ellipses, Parallax, and Retrograde Motion – Study Guide
... relation to retrograde motion or parallax. Apparent means what we see when we make our observations. Actual means what really happens as if observed from outside the solar system. For example, stars do NOT really shift in the sky as Earth orbits Sun (parallax) OR planets do NOT really change course ...
... relation to retrograde motion or parallax. Apparent means what we see when we make our observations. Actual means what really happens as if observed from outside the solar system. For example, stars do NOT really shift in the sky as Earth orbits Sun (parallax) OR planets do NOT really change course ...
1 HoNoRS227 Examination #3 Name
... star 4500 light years away. Why should you be skeptical of this report immediately? A Because the star is so far away, the scientist could not have the time to receive the radio signals from such a planet. B Because the star is so close that we should have received radio signals from the planet year ...
... star 4500 light years away. Why should you be skeptical of this report immediately? A Because the star is so far away, the scientist could not have the time to receive the radio signals from such a planet. B Because the star is so close that we should have received radio signals from the planet year ...
Direct Detection of Exoplanets
... Even if we can image an Earth-like planet in the habitable zone of some star, we will not be able to resolve its surface features in the foreseeable future. (No “zooming in” to see oceans, forests, city lights… Later we’ll see how you can detect some of these through reflected light.) Instead, we mu ...
... Even if we can image an Earth-like planet in the habitable zone of some star, we will not be able to resolve its surface features in the foreseeable future. (No “zooming in” to see oceans, forests, city lights… Later we’ll see how you can detect some of these through reflected light.) Instead, we mu ...
Chapter 7
... What does the Solar System consist of? • The Sun: It has 99.85% of the mass of the solar system • Eight planets. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune • Several dwarf planets. Pluto is one of them • There are around 169 satellites (moons). Except for three satellites orbi ...
... What does the Solar System consist of? • The Sun: It has 99.85% of the mass of the solar system • Eight planets. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune • Several dwarf planets. Pluto is one of them • There are around 169 satellites (moons). Except for three satellites orbi ...
Duncan Wright
... diameter on the sky (see Figure 2). The fibres are reformatted to make a pseudo slit that injects light into UCLES at resolution ~70000. Each of the 12 fibres produces it’s own spectrum that is extracted. To be capable of detecting the <10 m s-1 Doppler amplitudes expected from habitable zone planet ...
... diameter on the sky (see Figure 2). The fibres are reformatted to make a pseudo slit that injects light into UCLES at resolution ~70000. Each of the 12 fibres produces it’s own spectrum that is extracted. To be capable of detecting the <10 m s-1 Doppler amplitudes expected from habitable zone planet ...
Chapter 04
... 7. How did Nicolaus Copernicus account for the retrograde motion of the planets? a. Planets slow down, stop, and then reverse their orbital direction around the Earth. b. Inner planets orbit the Sun faster and pass outer planets as they orbit around the Sun. c. Each planet moves on an epicycle, that ...
... 7. How did Nicolaus Copernicus account for the retrograde motion of the planets? a. Planets slow down, stop, and then reverse their orbital direction around the Earth. b. Inner planets orbit the Sun faster and pass outer planets as they orbit around the Sun. c. Each planet moves on an epicycle, that ...
Chapter03
... I’ve found that many students think anyone who lived before 1900 (or perhaps even 1980) was hopelessly ignorant and dull. I love to use the accomplishments of the later Greek astronomers to teach them otherwise. Students seem impressed by Aristarchus’s work showing the enormous size of the solar sys ...
... I’ve found that many students think anyone who lived before 1900 (or perhaps even 1980) was hopelessly ignorant and dull. I love to use the accomplishments of the later Greek astronomers to teach them otherwise. Students seem impressed by Aristarchus’s work showing the enormous size of the solar sys ...
The Origin of Modern Astronomy(Seeds)
... 7. How did Nicolaus Copernicus account for the retrograde motion of the planets? a. Planets slow down, stop, and then reverse their orbital direction around the Earth. b. Inner planets orbit the Sun faster and pass outer planets as they orbit around the Sun. c. Each planet moves on an epicycle, that ...
... 7. How did Nicolaus Copernicus account for the retrograde motion of the planets? a. Planets slow down, stop, and then reverse their orbital direction around the Earth. b. Inner planets orbit the Sun faster and pass outer planets as they orbit around the Sun. c. Each planet moves on an epicycle, that ...
the Solar System PowerPoint
... Epimetheus and Janus, just inside the orbit of Mimas, are continually exchanging orbits with one another in a "waltz" -- they are called the coorbital satellites. ...
... Epimetheus and Janus, just inside the orbit of Mimas, are continually exchanging orbits with one another in a "waltz" -- they are called the coorbital satellites. ...
Tides, Moons, Rings, and Pluto
... Definition of a planet Then in 2005, an object orbiting beyond Pluto but 27% more massive than Pluto was discovered: this object was named Eris So should we make Eris the “tenth planet”? In 2006, the International Astronomical Union convened in Prague to set the definition of a planet and settle t ...
... Definition of a planet Then in 2005, an object orbiting beyond Pluto but 27% more massive than Pluto was discovered: this object was named Eris So should we make Eris the “tenth planet”? In 2006, the International Astronomical Union convened in Prague to set the definition of a planet and settle t ...
AST101_lect_18
... •The solar system is the right metallicity •The Sun is rather inactive •Earth is in just the right place in the habitable zone •The Moon stabilizes Earth's rotation •Earth is just the right mass to be tectonically active •Jupiter protects the Earth from bombardment by comets •The Solar System is unl ...
... •The solar system is the right metallicity •The Sun is rather inactive •Earth is in just the right place in the habitable zone •The Moon stabilizes Earth's rotation •Earth is just the right mass to be tectonically active •Jupiter protects the Earth from bombardment by comets •The Solar System is unl ...
Condensation of the Solar Nebula
... Comets in between Jupiter and Neptune were ‘bullied’ away from this region, either collide with the big planets, or been sent out to the Kuiper belt or the Oort cloud. ...
... Comets in between Jupiter and Neptune were ‘bullied’ away from this region, either collide with the big planets, or been sent out to the Kuiper belt or the Oort cloud. ...
uc6ss. - Math/Science Nucleus
... part structure. The outermost layer is the corona, the Sun’s outer atmosphere. This is a zone of super hot (temperatures vary, but range to millions of degrees centigrade). The corona is periodically hit by shock waves released from the Sun’s surface. Combined with its high temperature, this produce ...
... part structure. The outermost layer is the corona, the Sun’s outer atmosphere. This is a zone of super hot (temperatures vary, but range to millions of degrees centigrade). The corona is periodically hit by shock waves released from the Sun’s surface. Combined with its high temperature, this produce ...
JAF01 Lesson 10 The Universe
... Reading: The Moon – A Nice Place to Visit? The moon has been described by songwriters and poets as a place for a romantic escape. We know of course that the moon is actually a very hostile environment for human beings. The moon is completely devoid of water because the force of gravity on the moon i ...
... Reading: The Moon – A Nice Place to Visit? The moon has been described by songwriters and poets as a place for a romantic escape. We know of course that the moon is actually a very hostile environment for human beings. The moon is completely devoid of water because the force of gravity on the moon i ...
Tides on Earth
... Callisto - that were discovered by by Galileo in 1610. In addition to the four large moons discovered by Galileo, scientists have observed dozens of smaller moons around Jupiter. ...
... Callisto - that were discovered by by Galileo in 1610. In addition to the four large moons discovered by Galileo, scientists have observed dozens of smaller moons around Jupiter. ...
HW10 (due 4/24/14) (There are 205 possible points)
... ____ 27. Io has the most volcanic activity in the Solar System because: a. it is continually being bombarded with material in Saturn’s E ring b. it is one of the largest moons and its interior is heated by radioactive decays c. of gravitational friction caused by the moon Enceladus d. its interior i ...
... ____ 27. Io has the most volcanic activity in the Solar System because: a. it is continually being bombarded with material in Saturn’s E ring b. it is one of the largest moons and its interior is heated by radioactive decays c. of gravitational friction caused by the moon Enceladus d. its interior i ...
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.