Lectures 10-11: Planetary interiors o Topics to be covered:
... Summary of planetary interiors o Make-up of planetary interiors is dominated by physics of materials under high temperatures and pressures. o Starting with cold, low pressure regions, rocky materials are solids. o As one goes deeper into a planet, temperature and pressures rise. Solids become se ...
... Summary of planetary interiors o Make-up of planetary interiors is dominated by physics of materials under high temperatures and pressures. o Starting with cold, low pressure regions, rocky materials are solids. o As one goes deeper into a planet, temperature and pressures rise. Solids become se ...
Lecture 43
... the Sun, is a great ring of debris, similar to the asteroid belt but of much lower density material – presumably dominated by hydrocarbons and ices of H2O, CH4, and NH3 with lesser amounts of silicates. This region is thought to be the place of origin for short-period comets. There are estimated to ...
... the Sun, is a great ring of debris, similar to the asteroid belt but of much lower density material – presumably dominated by hydrocarbons and ices of H2O, CH4, and NH3 with lesser amounts of silicates. This region is thought to be the place of origin for short-period comets. There are estimated to ...
Understanding Planetary Motion
... Polish Monk and astronomer Challenged the Ptolemaic (Geocentric) Theory by devising the Copernican Heliocentric System ...
... Polish Monk and astronomer Challenged the Ptolemaic (Geocentric) Theory by devising the Copernican Heliocentric System ...
Chapter 4 The Solar System
... 4.1 An Inventory of the Solar System Early astronomers knew Moon, stars, Mercury, Venus, Mars, Jupiter, Saturn, comets, and meteors Now known: Solar system has 135 moons, one star, nine planets (added Uranus, Neptune, and Pluto), asteroids, comets, and meteoroids ...
... 4.1 An Inventory of the Solar System Early astronomers knew Moon, stars, Mercury, Venus, Mars, Jupiter, Saturn, comets, and meteors Now known: Solar system has 135 moons, one star, nine planets (added Uranus, Neptune, and Pluto), asteroids, comets, and meteoroids ...
Explain why the jovian planets are so much different
... Explain why the jovian planets are so much different from the terrestrial planets and why Jupiter has the most mass, followed by Saturn, and so forth. The jovian planets formed in a much colder region of the solar system where ice could condense. The terrestrial planets could only have cores of rock ...
... Explain why the jovian planets are so much different from the terrestrial planets and why Jupiter has the most mass, followed by Saturn, and so forth. The jovian planets formed in a much colder region of the solar system where ice could condense. The terrestrial planets could only have cores of rock ...
Lecture 12-13: Planetary atmospheres
... o Definition: m = µ mH o where m is molecular weight and mH is mass of H-atom (mH = 1.67 x 10-27 kg). so, for hydrogen µ = 1, and € for helium µ = 4 o hence at a given temperature the He atoms will be moving slower than H atoms o For Earth o Tatm = 288 K and vesc = 11.2 km s-1 o Hence, escape ...
... o Definition: m = µ mH o where m is molecular weight and mH is mass of H-atom (mH = 1.67 x 10-27 kg). so, for hydrogen µ = 1, and € for helium µ = 4 o hence at a given temperature the He atoms will be moving slower than H atoms o For Earth o Tatm = 288 K and vesc = 11.2 km s-1 o Hence, escape ...
Uranus - Rackspace
... • The planet's most extraordinary feature is the tilt of its rotational axis, which is almost perpendicular to the plane of the eclipitc, which means that it alternately has its north pole and its south pole turned towards the sun. ...
... • The planet's most extraordinary feature is the tilt of its rotational axis, which is almost perpendicular to the plane of the eclipitc, which means that it alternately has its north pole and its south pole turned towards the sun. ...
KS3 Physics – The Solar System
... Describe and explain why the speed of a comet varies during its orbit. Explain why we may see the same comets at regular intervals. Describe what could happen if a comet were to hit the Earth. Evaluate the advantages and disadvantages of using manned and unmanned spacecraft for exploration. ...
... Describe and explain why the speed of a comet varies during its orbit. Explain why we may see the same comets at regular intervals. Describe what could happen if a comet were to hit the Earth. Evaluate the advantages and disadvantages of using manned and unmanned spacecraft for exploration. ...
SCI-11 EXPLORATION OF THE SOLAR SYSTEM Logistic
... Exceptions: Earth’s big moon, Venus and Neptune’s rotation ...
... Exceptions: Earth’s big moon, Venus and Neptune’s rotation ...
astronomy - sfox4science
... stars, planets, asteroids, comets, and meteors, each having different properties. Our solar system exists within the Milky Way galaxy. The known components of our solar system are the Sun, four terrestrial planets (Mercury, Venus, Earth, Mars), four gas giants (Jupiter, Saturn, Uranus, Neptune), Plu ...
... stars, planets, asteroids, comets, and meteors, each having different properties. Our solar system exists within the Milky Way galaxy. The known components of our solar system are the Sun, four terrestrial planets (Mercury, Venus, Earth, Mars), four gas giants (Jupiter, Saturn, Uranus, Neptune), Plu ...
How Big is the Solar System?
... It is true that Pluto's average distance from the Sun is about 3,666,000,000 miles (1,019 paces in our model). But its orbit, instead of being nearly circular like those of the other planets, is very eccentric or elliptical: part of it is much nearer in toward the Sun and part much farther out. At p ...
... It is true that Pluto's average distance from the Sun is about 3,666,000,000 miles (1,019 paces in our model). But its orbit, instead of being nearly circular like those of the other planets, is very eccentric or elliptical: part of it is much nearer in toward the Sun and part much farther out. At p ...
SOLAR SYSTEM
... • Great dark spot discovered 1989. Believed to been a hole in atmosphere. (like High pressure on Earth) • It disappeared in 1994. • Rings are very thin and made of dust, not understood why some areas are more dense than others. • Has 13 moons, Triton largest. ...
... • Great dark spot discovered 1989. Believed to been a hole in atmosphere. (like High pressure on Earth) • It disappeared in 1994. • Rings are very thin and made of dust, not understood why some areas are more dense than others. • Has 13 moons, Triton largest. ...
PLUTO - science1d
... Although Charon is small, about 1,172 km (728 miles) in diameter, it about half of the size of Pluto itself. Charon orbits about 19,640 km from Pluto on average. It may be covered by water ice and probably has no atmosphere. Charon is in a synchronous orbit around Pluto. That is, Charon is always ov ...
... Although Charon is small, about 1,172 km (728 miles) in diameter, it about half of the size of Pluto itself. Charon orbits about 19,640 km from Pluto on average. It may be covered by water ice and probably has no atmosphere. Charon is in a synchronous orbit around Pluto. That is, Charon is always ov ...
Document
... The Sun, planets, asteroids, comets, planetesimals all revolve in the same direction with some exceptions. ...
... The Sun, planets, asteroids, comets, planetesimals all revolve in the same direction with some exceptions. ...
19uranusneptune5s
... Uranus was discovered in 1781 by William Herschel while surveying the sky Herschel had built a very high quality telescope and was systematically observing the brighter stars when he found Uranus ...
... Uranus was discovered in 1781 by William Herschel while surveying the sky Herschel had built a very high quality telescope and was systematically observing the brighter stars when he found Uranus ...
The Young Astronomers Newsletter Volume 22 Number 3 February
... for receipt and distribution of positional measurements of minor planets, comets and other irregular natural satellites of the major planets. It is responsible for the identification, designation and orbit computations and maintains the master files of observations and orbits, and keeps track of the ...
... for receipt and distribution of positional measurements of minor planets, comets and other irregular natural satellites of the major planets. It is responsible for the identification, designation and orbit computations and maintains the master files of observations and orbits, and keeps track of the ...
File - Joo Eon Park`s Portfolio
... Haumea. In 1930, Pluto was considered to be the ninth planet in the Solar System. However, in 2006, the International Astronomical Union decided that Pluto, Eris, and Ceres were dwarf planets. A dwarf planet is a celestial body that orbits the sun. It has enough mass to have a nearly round shape. It ...
... Haumea. In 1930, Pluto was considered to be the ninth planet in the Solar System. However, in 2006, the International Astronomical Union decided that Pluto, Eris, and Ceres were dwarf planets. A dwarf planet is a celestial body that orbits the sun. It has enough mass to have a nearly round shape. It ...
Planets in the sky
... Planets don’t always appear to move the same direction over the course of a year – Different from stars, Sun, and Moon – People have recognized this for a long time and knew that the planets were somehow different! The “backing up” of the planets is known as retrograde motion – Outer planets show re ...
... Planets don’t always appear to move the same direction over the course of a year – Different from stars, Sun, and Moon – People have recognized this for a long time and knew that the planets were somehow different! The “backing up” of the planets is known as retrograde motion – Outer planets show re ...
Identifying Solar System Patterns
... together, so that their orbital periods are similar. In comparison, the orbits of the gas giants are much more widely spaced, making the relative differences in their orbital periods much more significant. 2) What do you think causes this trend? The planets orbit in concentric ellipses (most are alm ...
... together, so that their orbital periods are similar. In comparison, the orbits of the gas giants are much more widely spaced, making the relative differences in their orbital periods much more significant. 2) What do you think causes this trend? The planets orbit in concentric ellipses (most are alm ...
Exam Name___________________________________
... 10) According to Copernicus, the retrograde motion for Mars must occur A) at quadrature, when Mars lies exactly 90 degrees east or west of the Sun. B) at greatest elongation, when Mars can get up to 47 degrees from the Sun. C) at opposition, when the Earth overtakes Mars and passes between Mars and ...
... 10) According to Copernicus, the retrograde motion for Mars must occur A) at quadrature, when Mars lies exactly 90 degrees east or west of the Sun. B) at greatest elongation, when Mars can get up to 47 degrees from the Sun. C) at opposition, when the Earth overtakes Mars and passes between Mars and ...
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.