SETI: First Considerations (PowerPoint)
... communicative ET civilizations right now in the Milky Way. But our working assumptions really mean that ET springs up on every well-placed planet around each suitable star some time after it forms, and that it persists in communicative form for a million years. This implies that there have been many ...
... communicative ET civilizations right now in the Milky Way. But our working assumptions really mean that ET springs up on every well-placed planet around each suitable star some time after it forms, and that it persists in communicative form for a million years. This implies that there have been many ...
Mon Nov 18, 2013 THE MOON`S TIDAL LOCK The old gibbous
... When people visit a planetarium, they expect to see stars and constellations – this is what we’re known for, and this is what we do best. At the Hallstrom Planetarium we use an optical-mechanical star projector, and for the past twenty years it’s faithfully replicated the experience of looking up at ...
... When people visit a planetarium, they expect to see stars and constellations – this is what we’re known for, and this is what we do best. At the Hallstrom Planetarium we use an optical-mechanical star projector, and for the past twenty years it’s faithfully replicated the experience of looking up at ...
2.1d-f-g Planets in the zodiac, inclined to the ecliptic
... Picture credits : (Sun) SOHO/ESA&NASA, (Earth) NASA/JSC-Apollo17 ...
... Picture credits : (Sun) SOHO/ESA&NASA, (Earth) NASA/JSC-Apollo17 ...
Exploring the Universe
... a. Red shift showed that nearly all galaxies are getting farther away from Earth 3. Blue shift: an apparent shift toward shorter wavelengths of light caused when a luminous object moves towards the observer ...
... a. Red shift showed that nearly all galaxies are getting farther away from Earth 3. Blue shift: an apparent shift toward shorter wavelengths of light caused when a luminous object moves towards the observer ...
I. Structure of the Earth
... of Alexandria (He was slightly off on this one) Distance between Syene & Alexandria (925km) slightly off Thought both cities were on the same line of longitude (off on this by 30) ...
... of Alexandria (He was slightly off on this one) Distance between Syene & Alexandria (925km) slightly off Thought both cities were on the same line of longitude (off on this by 30) ...
Quick Reference - Objects in the skies
... approximately 50 AU from the Sun. It is similar to the asteroid belt, although it is far larger - 20 times as wide and 20 to 200 times as massive. Like the asteroid belt, it consists mainly of small bodies, or remnants from the Solar System's formation. While most asteroids are composed primarily of ...
... approximately 50 AU from the Sun. It is similar to the asteroid belt, although it is far larger - 20 times as wide and 20 to 200 times as massive. Like the asteroid belt, it consists mainly of small bodies, or remnants from the Solar System's formation. While most asteroids are composed primarily of ...
Homework Problems for Quiz 1 – AY 5 – Spring 2013
... 1. If the Earth’s spin axis was not tilted with respect to the Earth’s orbital plane (around the Sun), which of the following would be true, which false?: The number of daylight hours in a day would not change through the year. The length of a day would increase from 24 hours to 365 days The change ...
... 1. If the Earth’s spin axis was not tilted with respect to the Earth’s orbital plane (around the Sun), which of the following would be true, which false?: The number of daylight hours in a day would not change through the year. The length of a day would increase from 24 hours to 365 days The change ...
(the largest solar system planet) represents at
... orbital plane is tilted approximately 18 degrees above the elliptical plane and is roughly the size of our earth’s moon. Given the orbital characteristic and size of Pluto, the science community recently reassigned Pluto as a dwarf planet. The Terrestrial Planets The terrestrial planets represent th ...
... orbital plane is tilted approximately 18 degrees above the elliptical plane and is roughly the size of our earth’s moon. Given the orbital characteristic and size of Pluto, the science community recently reassigned Pluto as a dwarf planet. The Terrestrial Planets The terrestrial planets represent th ...
This project is now funded
... Pluto ansd Eris, known as 'the dwarf planets'. Ceres orbits between Mars and Jupiter. Pluto orbits further away from the Sun than Neptune, while Eris orbits further out still. ...
... Pluto ansd Eris, known as 'the dwarf planets'. Ceres orbits between Mars and Jupiter. Pluto orbits further away from the Sun than Neptune, while Eris orbits further out still. ...
Professor Jonathan Fortney TA Kate Dallas Thursday, February 11
... 1) _____ A) measuring the orbital speed of one of Jupiter's moons. B) measuring the orbital period and distance of one of Jupiter's moons. C) knowing the Sun's mass and measuring how Jupiter's speed changes during its elliptical orbit around the Sun. D) knowing the Sun's mass and measuring the avera ...
... 1) _____ A) measuring the orbital speed of one of Jupiter's moons. B) measuring the orbital period and distance of one of Jupiter's moons. C) knowing the Sun's mass and measuring how Jupiter's speed changes during its elliptical orbit around the Sun. D) knowing the Sun's mass and measuring the avera ...
The Sun and planets
... and does not get dispersed in space thanks to the state of balance between the gravitational and pressure forces which are of equal intensity but act in opposite directions. Being made of gas, our star does not have a solid surface; we can think of the Sun as an enormous onion made of concentric lay ...
... and does not get dispersed in space thanks to the state of balance between the gravitational and pressure forces which are of equal intensity but act in opposite directions. Being made of gas, our star does not have a solid surface; we can think of the Sun as an enormous onion made of concentric lay ...
PSCI 1414 General Astronomy
... Because Mercury and Venus are always observed fairly near the Sun in the sky, their orbits must be smaller than the Earth’s. Planets in such orbits are called inferior planets. The other visible planets (Mars, Jupiter, and Saturn) are sometimes seen on the side of the celestial sphere opposite the S ...
... Because Mercury and Venus are always observed fairly near the Sun in the sky, their orbits must be smaller than the Earth’s. Planets in such orbits are called inferior planets. The other visible planets (Mars, Jupiter, and Saturn) are sometimes seen on the side of the celestial sphere opposite the S ...
Rocket Science
... Since the velocity of a satellite on the surface of a planet is vo… …then the velocity needed to launch a rocket into orbit of radius r; altitude of r-rp is v2 = vo2 + vL2 vL2 = v2 - vo2 ...
... Since the velocity of a satellite on the surface of a planet is vo… …then the velocity needed to launch a rocket into orbit of radius r; altitude of r-rp is v2 = vo2 + vL2 vL2 = v2 - vo2 ...
Lecture 3 - Concord University
... opredictions not better than in Ptolemy’s model→ geometrically equivalent oCopernicus’ model not generally accepted and Ptolemaic–Copernican o disagreement thought to be metaphysical, unanswerable question ...
... opredictions not better than in Ptolemy’s model→ geometrically equivalent oCopernicus’ model not generally accepted and Ptolemaic–Copernican o disagreement thought to be metaphysical, unanswerable question ...
DTU 8e Chap 5 Formation of the Solar System
... What typical shape(s) do moons have, and why? Although some moons are spherical, most look roughly like potatoes. Those that are spherical are held together by the force of gravity, which pulls down high regions. Those that are potato-shaped are held together by the electromagnetic interaction betwe ...
... What typical shape(s) do moons have, and why? Although some moons are spherical, most look roughly like potatoes. Those that are spherical are held together by the force of gravity, which pulls down high regions. Those that are potato-shaped are held together by the electromagnetic interaction betwe ...
Exhibit Scavenger Hunt - Friends of the Observatory
... It takes more than 42 hours for the direction of the pendulum’s swing to appear to rotate 360 degrees at Griffith Observatory’s latitude. How many hours would it take at the North or South Pole? It would take just under 24 hours for the direction of the pendulum’s swing to appear to rotate 360 degre ...
... It takes more than 42 hours for the direction of the pendulum’s swing to appear to rotate 360 degrees at Griffith Observatory’s latitude. How many hours would it take at the North or South Pole? It would take just under 24 hours for the direction of the pendulum’s swing to appear to rotate 360 degre ...
Document
... • Rock & Metals form where T < 1300 K • Carbon grains & ices where T(gas) < 300 K • Inner planets and asteroids: Rocky and metallic • Snow line • Outer Jovian systems: Gaseous giants, carbon ices • Dust grains and ices collide, accrete, and eventually grow bigger gravitationally into planetesimals b ...
... • Rock & Metals form where T < 1300 K • Carbon grains & ices where T(gas) < 300 K • Inner planets and asteroids: Rocky and metallic • Snow line • Outer Jovian systems: Gaseous giants, carbon ices • Dust grains and ices collide, accrete, and eventually grow bigger gravitationally into planetesimals b ...
Universe Notes - Solon City Schools
... a. Red shift showed that nearly all galaxies are getting farther away from Earth 3. Blue shift: an apparent shift toward shorter wavelengths of light caused when a luminous object moves towards the observer ...
... a. Red shift showed that nearly all galaxies are getting farther away from Earth 3. Blue shift: an apparent shift toward shorter wavelengths of light caused when a luminous object moves towards the observer ...
Planets
... Three distinct sets of rings of Saturn are visible from earth. Saturn is the only planet with a system of well-developed rings encircling it.The rings of Saturn are made up of tiny particles, all orbiting the Saturn like miniature satellites The rings of Saturn cannot be seen with naked eyes, they ...
... Three distinct sets of rings of Saturn are visible from earth. Saturn is the only planet with a system of well-developed rings encircling it.The rings of Saturn are made up of tiny particles, all orbiting the Saturn like miniature satellites The rings of Saturn cannot be seen with naked eyes, they ...
PH109 Exploring the Universe
... (d), what happens to the gravitation force between them a) stays the same, b) increases by a factor of four c) decreases by a factor of four, d) increases by a factor of two 27. A police officer tells me that I my blue shift velocity exceeded posted limits. What does he mean? a) you were speeding aw ...
... (d), what happens to the gravitation force between them a) stays the same, b) increases by a factor of four c) decreases by a factor of four, d) increases by a factor of two 27. A police officer tells me that I my blue shift velocity exceeded posted limits. What does he mean? a) you were speeding aw ...
Extraterrestrial life
Extraterrestrial life is life that does not originate from Earth. It is also called alien life, or, if it is a sentient and/or relatively complex individual, an ""extraterrestrial"" or ""alien"" (or, to avoid confusion with the legal sense of ""alien"", a ""space alien""). These as-yet-hypothetical life forms range from simple bacteria-like organisms to beings with civilizations far more advanced than humanity. Although many scientists expect extraterrestrial life to exist, so far no unambiguous evidence for its existence exists.The science of extraterrestrial life is known as exobiology. The science of astrobiology also considers life on Earth as well, and in the broader astronomical context. Meteorites that have fallen to Earth have sometimes been examined for signs of microscopic extraterrestrial life. Since the mid-20th century, there has been an ongoing search for signs of extraterrestrial intelligence, from radios used to detect possible extraterrestrial signals, to telescopes used to search for potentially habitable extrasolar planets. It has also played a major role in works of science fiction. Over the years, science fiction works, especially Hollywood's involvement, has increased the public's interest in the possibility of extraterrestrial life. Some encourage aggressive methods to try to get in contact with life in outer space, whereas others argue that it might be dangerous to actively call attention to Earth.