Lecture 27 (pdf from the powerpoint)
... •fp = the fraction of those stars which have planets •Estimated by Drake as 0.5. It is now known from modern planet searches that at least 10% of sunlike stars have planets, and the true proportion may be much higher, since only planets gas-giant size and larger can be detected with current technolo ...
... •fp = the fraction of those stars which have planets •Estimated by Drake as 0.5. It is now known from modern planet searches that at least 10% of sunlike stars have planets, and the true proportion may be much higher, since only planets gas-giant size and larger can be detected with current technolo ...
Our Solar System
... Gas Giant: large, OUTER planet that is made mostly of gases Jupiter • largest planet • known for its storm, “The Great Red Spot” Saturn • known for its ring system Uranus • known for blue-green atmosphere ...
... Gas Giant: large, OUTER planet that is made mostly of gases Jupiter • largest planet • known for its storm, “The Great Red Spot” Saturn • known for its ring system Uranus • known for blue-green atmosphere ...
What is a planet?
... • composed mostly of H and He but enriched in metals and appear to have rock-ice core comprising 10-20 Earth masses ...
... • composed mostly of H and He but enriched in metals and appear to have rock-ice core comprising 10-20 Earth masses ...
Astronomy from the ancients to the Renaissance
... east. This is called direct motion. Every so often a planet moves from east to west against the background of stars. This is called retrograde motion. The amount of time between occurrences of retrograde motion for any given planet is called the synodic period. ...
... east. This is called direct motion. Every so often a planet moves from east to west against the background of stars. This is called retrograde motion. The amount of time between occurrences of retrograde motion for any given planet is called the synodic period. ...
File
... Newton’s Law of Gravitation: relationship between mass, force, & distance This formula gives the amount of gravitational force between any two masses in the universe. At double the distance, the force is one quarter. Gravity is never zero. Centripetal Force Centripetal Force is the force needed to m ...
... Newton’s Law of Gravitation: relationship between mass, force, & distance This formula gives the amount of gravitational force between any two masses in the universe. At double the distance, the force is one quarter. Gravity is never zero. Centripetal Force Centripetal Force is the force needed to m ...
1. In Ptolemy`s geocentric model, the planet`s mo
... original heliocentric model failed, because Kepler described the orbits as A) being on equants instead of epicycles. B) complex, with epicycles to account for retrograde motions. C) much larger than Copernicus had envisioned. D) around the Sun, not the earth. E) elliptical, not circular. 27. When a ...
... original heliocentric model failed, because Kepler described the orbits as A) being on equants instead of epicycles. B) complex, with epicycles to account for retrograde motions. C) much larger than Copernicus had envisioned. D) around the Sun, not the earth. E) elliptical, not circular. 27. When a ...
UV Radiation in Different Stellar Systems
... of Earth-like planets in stellar HZ is possible for the cases of 70 Vir and 51 Peg, even though they cannot be detected with the present telescopes. On the other hand, from theoretical dynamical considerations, they also found that the presence of Earth-like planets within the UV and optical HZ of G ...
... of Earth-like planets in stellar HZ is possible for the cases of 70 Vir and 51 Peg, even though they cannot be detected with the present telescopes. On the other hand, from theoretical dynamical considerations, they also found that the presence of Earth-like planets within the UV and optical HZ of G ...
Document
... time on equator is 17 hours 14 minutes. The period of revolving around the Sun is 84 years. It has about 30 satellites. ...
... time on equator is 17 hours 14 minutes. The period of revolving around the Sun is 84 years. It has about 30 satellites. ...
Lecture 1: Our Solar System
... orbit of Neptune, where it resided from 1979 thru February 1999 • Moon (Charon) discovered in ...
... orbit of Neptune, where it resided from 1979 thru February 1999 • Moon (Charon) discovered in ...
LESSON PLAN: National Geographic Magazine Archive
... Have students go from station to station spending 2‐3 minutes at each station copying down the information to their note sheet. It will vary from class to class how many students are in each group and how long they take. Student presentations‐ Have students present information from one of the ...
... Have students go from station to station spending 2‐3 minutes at each station copying down the information to their note sheet. It will vary from class to class how many students are in each group and how long they take. Student presentations‐ Have students present information from one of the ...
The Small Objects. The Sun.
... Comets Comets are basically dirty snowballs where ice mixes with rocky dust. Their mean size is a few kilometers across. Comets change appearance when they approach the Sun. The comet body is called nucleus. ...
... Comets Comets are basically dirty snowballs where ice mixes with rocky dust. Their mean size is a few kilometers across. Comets change appearance when they approach the Sun. The comet body is called nucleus. ...
The Solar System - Henry County Schools
... • Study notes and vocabulary over the universe and solar system in preparation for tomorrow’s quiz ...
... • Study notes and vocabulary over the universe and solar system in preparation for tomorrow’s quiz ...
Now - National Geographic Magazine, UK
... began completing exactly one orbit for every two of Jupiter’s. That triggered a ...
... began completing exactly one orbit for every two of Jupiter’s. That triggered a ...
How are the planets in the solar system alike and different?
... In what ways are Jupiter and Saturn alike? They are both outer planets, are gas giants, have rings and take about 10 Earth days to rotate. How long is one year on Jupiter? 12 Earth years How do gas giants differ from rocky planets? Gas giants are much larger and farther apart. They are made mostly o ...
... In what ways are Jupiter and Saturn alike? They are both outer planets, are gas giants, have rings and take about 10 Earth days to rotate. How long is one year on Jupiter? 12 Earth years How do gas giants differ from rocky planets? Gas giants are much larger and farther apart. They are made mostly o ...
Jim_lecture_Chapter
... • The real payoff will come from observing Earth-like planets directly, i.e., separating their light from that of the star, and taking spectra of their atmospheres • This will require large, space-based telescopes – Earth-sized planets could conceivably be detected by future 30 m-class groundbased t ...
... • The real payoff will come from observing Earth-like planets directly, i.e., separating their light from that of the star, and taking spectra of their atmospheres • This will require large, space-based telescopes – Earth-sized planets could conceivably be detected by future 30 m-class groundbased t ...
Document
... Exoplanets are extreme cases of binaries, where one member is much less massive than the other. So we can use some of the same techniques as binaries for detection, and mass measurement. We’ll discuss some of these methods. ...
... Exoplanets are extreme cases of binaries, where one member is much less massive than the other. So we can use some of the same techniques as binaries for detection, and mass measurement. We’ll discuss some of these methods. ...
Sun, Moon, and Earth Notes
... universe- Everything that exists anywhere in space. It includes all the galaxies, stars, planets, and other bodies that they may contain. star- A huge ball of glowing gas that appears as a bright point in the night sky. Astronomers think there are more that 200 billion stars in the universe. sun- Th ...
... universe- Everything that exists anywhere in space. It includes all the galaxies, stars, planets, and other bodies that they may contain. star- A huge ball of glowing gas that appears as a bright point in the night sky. Astronomers think there are more that 200 billion stars in the universe. sun- Th ...
Name Date____________________ Block_________ Astronomy
... b. Gravity pull of the Moon c. The Earth’s Elliptical Orbit d. Parallax 2. During which phase of the moon, will we experience Spring tides: a. 1st quarter b. Waxing crescent c. Waning gibbous d. New Moon 3. The model of the solar system with the Sun at the center is called: a. Geocentric b. Heliocen ...
... b. Gravity pull of the Moon c. The Earth’s Elliptical Orbit d. Parallax 2. During which phase of the moon, will we experience Spring tides: a. 1st quarter b. Waxing crescent c. Waning gibbous d. New Moon 3. The model of the solar system with the Sun at the center is called: a. Geocentric b. Heliocen ...
Solutions
... Suppose someone claimed to make the discoveries described below. (These are not real discoveries.) Decide whether each discovery should be considered reasonable or surprising. Explain clearly; not all these have definitive answers, so your explanation is more important than your chosen answer. 19. A ...
... Suppose someone claimed to make the discoveries described below. (These are not real discoveries.) Decide whether each discovery should be considered reasonable or surprising. Explain clearly; not all these have definitive answers, so your explanation is more important than your chosen answer. 19. A ...
Lecture7 - UCSB Physics
... age dating, are used to determine the rocks formed 4.56 x 109 years ago. ...
... age dating, are used to determine the rocks formed 4.56 x 109 years ago. ...
here
... • Formed beyond the frost line, comets are icy counterparts to asteroids. • Nucleus of comet a “dirty snowball” • Most comets do not have tails. • Most comets remain perpetually frozen in the outer solar system. • Only comets that enter the inner solar ...
... • Formed beyond the frost line, comets are icy counterparts to asteroids. • Nucleus of comet a “dirty snowball” • Most comets do not have tails. • Most comets remain perpetually frozen in the outer solar system. • Only comets that enter the inner solar ...
The planets in the solar system
... drawing in additional material by their gravitational attraction. These concentrations become ever denser until they collapse inward under gravity to form proto-planets. When the proto-star has grown massive enough to ignite and form a star, the rest of the disk is removed from the inside outward by ...
... drawing in additional material by their gravitational attraction. These concentrations become ever denser until they collapse inward under gravity to form proto-planets. When the proto-star has grown massive enough to ignite and form a star, the rest of the disk is removed from the inside outward by ...
Week 2 File
... astronomical observa8ons. Some of these provided direct evidence for the heliocentric model and were published in Siderius Nuncius (Starry Messenger). ...
... astronomical observa8ons. Some of these provided direct evidence for the heliocentric model and were published in Siderius Nuncius (Starry Messenger). ...
Planets beyond Neptune
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and culminated at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the Planet X hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities.Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet. The search was largely abandoned in the early 1990s, when a study of measurements made by the Voyager 2 spacecraft found that the irregularities observed in Uranus's orbit were due to a slight overestimation of Neptune's mass. After 1992, the discovery of numerous small icy objects with similar or even wider orbits than Pluto led to a debate over whether Pluto should remain a planet, or whether it and its neighbours should, like the asteroids, be given their own separate classification. Although a number of the larger members of this group were initially described as planets, in 2006 the International Astronomical Union reclassified Pluto and its largest neighbours as dwarf planets, leaving Neptune the farthest known planet in the Solar System.Today, the astronomical community widely agrees that Planet X, as originally envisioned, does not exist, but the concept of Planet X has been revived by a number of astronomers to explain other anomalies observed in the outer Solar System. In popular culture, and even among some astronomers, Planet X has become a stand-in term for any undiscovered planet in the outer Solar System, regardless of its relationship to Lowell's hypothesis. Other trans-Neptunian planets have also been suggested, based on different evidence. As of March 2014, observations with the WISE telescope have ruled out the possibility of a Saturn-sized object out to 10,000 AU, and a Jupiter-sized or larger object out to 26,000 AU.