November - Hawaiian Astronomical Society
... telescope, sometimes just called Herschel, orbits the Sun about a million miles from the Earth. The meeting began with dinner at Karl’s house. Karl charred chorizo on the backyard grill while the airplanes dribbled into Dulles airport. Our colleagues arrived, jetlagged and yawning, from Germany, Swe ...
... telescope, sometimes just called Herschel, orbits the Sun about a million miles from the Earth. The meeting began with dinner at Karl’s house. Karl charred chorizo on the backyard grill while the airplanes dribbled into Dulles airport. Our colleagues arrived, jetlagged and yawning, from Germany, Swe ...
ET: Astronomy 230 Outline Important Caveat
... about fp ~ 0.03, but not sensitive to lower mass systems. • Maximum is 1 and lower limit is probably around 0.01. • A high fraction assumes that the disks often form a planet or planets of some kind. • A low fraction assumes that even if there are disks, planets do not form. • This is not Earth-like ...
... about fp ~ 0.03, but not sensitive to lower mass systems. • Maximum is 1 and lower limit is probably around 0.01. • A high fraction assumes that the disks often form a planet or planets of some kind. • A low fraction assumes that even if there are disks, planets do not form. • This is not Earth-like ...
Name: Period:______ Date:______ Astronomy Vocabulary DUE
... Big Bang theory- The initial explosion that resulted in the formation and expansion of the universe. This explosion release hydrogen and helium which make-up 99% of our know universe. ...
... Big Bang theory- The initial explosion that resulted in the formation and expansion of the universe. This explosion release hydrogen and helium which make-up 99% of our know universe. ...
Jupiter: Cosmic Jekyll and Hyde - Mary Ann Liebert, Inc. publishers
... which did simulate close planet/planetesimal encounters, revealed that, for particles initially situated between Jupiter and Saturn, 24% had single encounters with jovian planets that propelled them into Mars-crossing orbits. From the Saturn/ Uranus region, 15% of particles became Mars-crossers, alo ...
... which did simulate close planet/planetesimal encounters, revealed that, for particles initially situated between Jupiter and Saturn, 24% had single encounters with jovian planets that propelled them into Mars-crossing orbits. From the Saturn/ Uranus region, 15% of particles became Mars-crossers, alo ...
Planet Mercury.
... The surface of the planet is covered in craters much like those seen on Earth’s moon. This is a sign that Mercury has been geologically dormant for billions of years. Since Mercury’s orbit is within Earth’s orbit, it can be viewed from Earth in the early morning or the late evening, but never in ...
... The surface of the planet is covered in craters much like those seen on Earth’s moon. This is a sign that Mercury has been geologically dormant for billions of years. Since Mercury’s orbit is within Earth’s orbit, it can be viewed from Earth in the early morning or the late evening, but never in ...
Why Study Binary Stars?
... The amount of light lost depends on eclipsed area & temperature The area covered at each minimum is the same Depth of the minimum depends on eclipsed star’s temperature Primary eclipse is always when the hotter star is behind the cooler star ...
... The amount of light lost depends on eclipsed area & temperature The area covered at each minimum is the same Depth of the minimum depends on eclipsed star’s temperature Primary eclipse is always when the hotter star is behind the cooler star ...
Planet formation in the habitable zone of alpha Centauri B
... τdiss = 105 years. The dissipation is started at 104 years, the end of our nominal run, when all orbits have reached their size-dependent alignment in the HZ. Fig.3 shows the dynamical state of the system after 2τdiss = 2x105 years and clearly illustrates the efficient re-phasing of all orbits, whic ...
... τdiss = 105 years. The dissipation is started at 104 years, the end of our nominal run, when all orbits have reached their size-dependent alignment in the HZ. Fig.3 shows the dynamical state of the system after 2τdiss = 2x105 years and clearly illustrates the efficient re-phasing of all orbits, whic ...
A dust ring around Epsilon Eridani: analogue to the young Solar
... P-R drag, grains ∼ 1 mm in diameter would have been cleared only to radii of about 15 AU (Jura 1990), even if the star is as old as 1 Gyr. Thus it would be difficult to reproduce clearing out to the observed 35 AU. Also, P-R drag naturally produces a 1/r density distribution as small grains spiral i ...
... P-R drag, grains ∼ 1 mm in diameter would have been cleared only to radii of about 15 AU (Jura 1990), even if the star is as old as 1 Gyr. Thus it would be difficult to reproduce clearing out to the observed 35 AU. Also, P-R drag naturally produces a 1/r density distribution as small grains spiral i ...
Here
... 6. How did Copernicus explain the retrograde motions of the planets? 10. What are Kepler’s three laws? Why are they important? 11. In what ways did the astronomical observations of Galileo support a heliocentric cosmology? 12. How did Newton’s approach to understanding planetary motion differ from t ...
... 6. How did Copernicus explain the retrograde motions of the planets? 10. What are Kepler’s three laws? Why are they important? 11. In what ways did the astronomical observations of Galileo support a heliocentric cosmology? 12. How did Newton’s approach to understanding planetary motion differ from t ...
JUPITER AND SPEED OF LIGHT
... The four smaller inner planets, also called the terrestrial planets, are primarily composed of rock and metal. The four outer planets, the gas giants, are substantially more massive than the terrestrials. These planets are Jupiter, Saturn, Uranus and Neptune. The largest, Jupiter, is composed mainly ...
... The four smaller inner planets, also called the terrestrial planets, are primarily composed of rock and metal. The four outer planets, the gas giants, are substantially more massive than the terrestrials. These planets are Jupiter, Saturn, Uranus and Neptune. The largest, Jupiter, is composed mainly ...
WORD - Astrophysics
... Stars have focused the interest of astronomers for centuries. A great variety of observations have driven our knowledge of the processes leading to star formation, of how the interplay between gravity and nuclear reactions determine stellar evolution, and ultimately, the physical principles that exp ...
... Stars have focused the interest of astronomers for centuries. A great variety of observations have driven our knowledge of the processes leading to star formation, of how the interplay between gravity and nuclear reactions determine stellar evolution, and ultimately, the physical principles that exp ...
rEVIEW CHAPTER 6
... 46. How does the weight of a Mars lander change as it travels from Earth to Mars? Does the weight ever equal zero? Does the mass of the lander change? Explain your answers. (6.1) K/U T/I C 47. Ceres is a dwarf planet located in the asteroid belt between the orbits of Mars and Jupiter. The radi ...
... 46. How does the weight of a Mars lander change as it travels from Earth to Mars? Does the weight ever equal zero? Does the mass of the lander change? Explain your answers. (6.1) K/U T/I C 47. Ceres is a dwarf planet located in the asteroid belt between the orbits of Mars and Jupiter. The radi ...
Summer 2014 Mercury - Astronomical Society of the Pacific
... hen I was a young girl, my family used to leave the city and drive to a quiet lakeside resort in the mountains. My father fished from the dock from dawn until dusk, catching bass in the morning, trout at midday, and catfish in the late afternoon. My mother slathered herself from head to toe in cocon ...
... hen I was a young girl, my family used to leave the city and drive to a quiet lakeside resort in the mountains. My father fished from the dock from dawn until dusk, catching bass in the morning, trout at midday, and catfish in the late afternoon. My mother slathered herself from head to toe in cocon ...
Uranus Neptune Pluto
... 15. We could divide the Jovian planets into two subclasses, the Gas Giants and the Ice Giants. Into which groups should we place the four Jovian planets? a. The Gas Giants are Uranus & Neptune, and the Ice Giants are Jupiter & Saturn. b. The Gas Giants are Jupiter & Saturn, and the Ice Giants are Ur ...
... 15. We could divide the Jovian planets into two subclasses, the Gas Giants and the Ice Giants. Into which groups should we place the four Jovian planets? a. The Gas Giants are Uranus & Neptune, and the Ice Giants are Jupiter & Saturn. b. The Gas Giants are Jupiter & Saturn, and the Ice Giants are Ur ...
A new low proper motion catalogue of bright M
... galactic plane and other regions that had a high density of stars and dust. This may be added in at a later time using the appropriate reddening corrections and after accounting for crowding. ...
... galactic plane and other regions that had a high density of stars and dust. This may be added in at a later time using the appropriate reddening corrections and after accounting for crowding. ...
Celestia DATA WORKSHEET
... 9. OK, let’s take a spaceflight. Zoom in on the sun with the “Home” key until it fills the screen. Look in the upper left corner. It’s apparent magnitude (in parentheses), should be between – 36 and -37. Now, to get our spaceship moving, press the “A” key on the keyboard. Notice that our speed, disp ...
... 9. OK, let’s take a spaceflight. Zoom in on the sun with the “Home” key until it fills the screen. Look in the upper left corner. It’s apparent magnitude (in parentheses), should be between – 36 and -37. Now, to get our spaceship moving, press the “A” key on the keyboard. Notice that our speed, disp ...
September 2016
... overhead is known as the Zenith or Nadir and is shown at the upper centre of the chart. The curved brown line across the sky at the bottom is the Ecliptic or Zodiac. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through which the e ...
... overhead is known as the Zenith or Nadir and is shown at the upper centre of the chart. The curved brown line across the sky at the bottom is the Ecliptic or Zodiac. This is the imaginary line along which the Sun, Moon and planets appear to move across the sky. The constellations through which the e ...
Neptune is the eighth planet from the Sun and the fourth largest (by
... between the English and French (though not, apparently between Adams and Le Verrier personally) over priority and the right to name the new planet; they are now jointly credited with Neptune's discovery. Subsequent observations have shown that the orbits calculated by Adams and Le Verrier diverge fr ...
... between the English and French (though not, apparently between Adams and Le Verrier personally) over priority and the right to name the new planet; they are now jointly credited with Neptune's discovery. Subsequent observations have shown that the orbits calculated by Adams and Le Verrier diverge fr ...
The Transiting Exoplanet Survey Satellite
... its host star. For such a “transiting” planet, it is possible to determine the planet’s mass and radius, its orbital parameters, and its atmospheric properties.1 Of particular interest are planets with sizes between those of the Earth and Neptune. Little is known about them, because there are no exa ...
... its host star. For such a “transiting” planet, it is possible to determine the planet’s mass and radius, its orbital parameters, and its atmospheric properties.1 Of particular interest are planets with sizes between those of the Earth and Neptune. Little is known about them, because there are no exa ...
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.