April News Letter - Boise Astronomical Society
... predecessor, Pioneer 10, Pioneer 11 was targeted for Saturn after its Jupiter encounter. During its flyby of Saturn in 1979, the spacecraft narrowly avoided a collision with the moon Epimetheus, an unknown satellite back in 1979. Because of Jupiter’s distance from the sun, Pioneer 11 relied on nucle ...
... predecessor, Pioneer 10, Pioneer 11 was targeted for Saturn after its Jupiter encounter. During its flyby of Saturn in 1979, the spacecraft narrowly avoided a collision with the moon Epimetheus, an unknown satellite back in 1979. Because of Jupiter’s distance from the sun, Pioneer 11 relied on nucle ...
click here - CAPSTONE 2011
... we can use the HR diagram to determine absolute mag. • Then, the distance follows from mV-MV=5log r-5 + AV • AV is the extinction due to dust that must be corrected for. • Once we know absolute mag., we can get luminosity • M1-Mo = -2.5 log (L1/Lo) (using the Sun as reference) • Divide by -2.5 on bo ...
... we can use the HR diagram to determine absolute mag. • Then, the distance follows from mV-MV=5log r-5 + AV • AV is the extinction due to dust that must be corrected for. • Once we know absolute mag., we can get luminosity • M1-Mo = -2.5 log (L1/Lo) (using the Sun as reference) • Divide by -2.5 on bo ...
Minor bodies - Polarisation.eu
... Kuiper Belt: - Planetesimals form further than Neptune. - Made of ice because they are further than the frost line. - Not forming large planets because of low density and resonances with jovian planets. - Planetesimals remain in the ecliptic plane. ...
... Kuiper Belt: - Planetesimals form further than Neptune. - Made of ice because they are further than the frost line. - Not forming large planets because of low density and resonances with jovian planets. - Planetesimals remain in the ecliptic plane. ...
Document
... Because of this high pressure, Jupiter’s interior is probably composed of ultracompressed hydrogen surrounding a rocky core consisting of perhaps 10 Earth masses of iron and silicates (see figure). ...
... Because of this high pressure, Jupiter’s interior is probably composed of ultracompressed hydrogen surrounding a rocky core consisting of perhaps 10 Earth masses of iron and silicates (see figure). ...
09astrophysics_2007Nov
... •The distances of each star to the center is inversely proportional to their masses: m1r1=m2r2 ...
... •The distances of each star to the center is inversely proportional to their masses: m1r1=m2r2 ...
Exercises - Leiden Observatory
... v. Rapid changes that are sometimes observed in stars may indicate that dynamical processes are taking place. From the timescales of such changes - usually oscillations with a characteristic period - we may roughly estimate the average density of the Star. The sun has been observed to oscillate with ...
... v. Rapid changes that are sometimes observed in stars may indicate that dynamical processes are taking place. From the timescales of such changes - usually oscillations with a characteristic period - we may roughly estimate the average density of the Star. The sun has been observed to oscillate with ...
SylTerNav\4Curr\emet
... orbit and the stability of the axis (ignoring precession) and show how it causes the seasons; 7.1.5 state the dates of the solstices and equinoxes; 7.1.6 explain the concept of the earth's axial rotation causing day and night; 7.1.7 explain what causes the varying length of daylight through the year ...
... orbit and the stability of the axis (ignoring precession) and show how it causes the seasons; 7.1.5 state the dates of the solstices and equinoxes; 7.1.6 explain the concept of the earth's axial rotation causing day and night; 7.1.7 explain what causes the varying length of daylight through the year ...
Lecture 3 - Purdue University
... Question • In the Old Man and the Sea, Hemingway described the old man lying in his boat off the coast of Cuba, looking up at the sky just after sunset: “It was dark now as it becomes dark quickly after the sun sets in September. He lay against the worn wood of the bow and rested all that he could. ...
... Question • In the Old Man and the Sea, Hemingway described the old man lying in his boat off the coast of Cuba, looking up at the sky just after sunset: “It was dark now as it becomes dark quickly after the sun sets in September. He lay against the worn wood of the bow and rested all that he could. ...
I. Early History of Astronomy
... 2. Tried to find stellar parallax: the apparent shift in a star's position due to the revolution of Earth 3. Did not believe in the Copernican system because he was unable to observe stellar parallax ...
... 2. Tried to find stellar parallax: the apparent shift in a star's position due to the revolution of Earth 3. Did not believe in the Copernican system because he was unable to observe stellar parallax ...
new course proposal form
... the Moon’s origin, its phases and its tidal effects on Earth. Compare and contrast the major physical characteristics of the Earth and Moon. Compare theories of formation of stars and their planetary systems. Use occultation data (such as from the Pluto-Charon system) to determine the diameter of ea ...
... the Moon’s origin, its phases and its tidal effects on Earth. Compare and contrast the major physical characteristics of the Earth and Moon. Compare theories of formation of stars and their planetary systems. Use occultation data (such as from the Pluto-Charon system) to determine the diameter of ea ...
Document
... “Constancy of the tilt angle is a factor that provides long-term stability of the Earth’s temperature. If the polar tilt axis had undergone wide deviations from its present value, Earth’s climate would have been much less hospitable….. Rare Earth, p 224. These results show that the situation of the ...
... “Constancy of the tilt angle is a factor that provides long-term stability of the Earth’s temperature. If the polar tilt axis had undergone wide deviations from its present value, Earth’s climate would have been much less hospitable….. Rare Earth, p 224. These results show that the situation of the ...
Equivalence Principle Acceleration = Gravity Inertial Mass
... • Now, let’s drop two balls with different weights (different mgravity) from the roof of RLM and see which one reaches the ground first. – (Ignoring friction by air) both balls will reach the ground at the same time. This must imply that minertial = mgravity – Acceleration would be different for two ...
... • Now, let’s drop two balls with different weights (different mgravity) from the roof of RLM and see which one reaches the ground first. – (Ignoring friction by air) both balls will reach the ground at the same time. This must imply that minertial = mgravity – Acceleration would be different for two ...
The Life of the Sun
... Fraser: We’ve covered that before. [Laughter] I’ve seen some competing series on this but essentially 500 million to a billion years from now there will be no liquid water. Water vapor will have boiled off into Space. We’ll essentially be very much like Venus, just a little cooler. Pamela: Yeah. Fr ...
... Fraser: We’ve covered that before. [Laughter] I’ve seen some competing series on this but essentially 500 million to a billion years from now there will be no liquid water. Water vapor will have boiled off into Space. We’ll essentially be very much like Venus, just a little cooler. Pamela: Yeah. Fr ...
PPT
... There must be some very large distance such that light from a galaxy at that distance hasn’t reached us during the age of the universe. The expansion velocity of galaxies at that distance, relative to us, must be a) zero b) infinite c) less than the speed of light d) the speed of light or greater Pa ...
... There must be some very large distance such that light from a galaxy at that distance hasn’t reached us during the age of the universe. The expansion velocity of galaxies at that distance, relative to us, must be a) zero b) infinite c) less than the speed of light d) the speed of light or greater Pa ...
Astrobiology: young science, old questions
... life will be the study of exo-Earths: Earth-type How do we differentiate between one exo-Earth into its 11 Gyr main sequence lifetime, was only planets orbiting distant stars. Although no such and the next? What factors help determine about 70% of its present luminosity when it planets have yet been ...
... life will be the study of exo-Earths: Earth-type How do we differentiate between one exo-Earth into its 11 Gyr main sequence lifetime, was only planets orbiting distant stars. Although no such and the next? What factors help determine about 70% of its present luminosity when it planets have yet been ...
Sun, Earth, and Moon
... • The famous image of the Moon frequently used in the media, consisting of only a thin crescent slice of the Moon being visible from Earth. • This phase of the moon occurs just after the New Moon phase, which is also known as Dark of the Moon. There is also a Crescent Moon phase just prior to the ne ...
... • The famous image of the Moon frequently used in the media, consisting of only a thin crescent slice of the Moon being visible from Earth. • This phase of the moon occurs just after the New Moon phase, which is also known as Dark of the Moon. There is also a Crescent Moon phase just prior to the ne ...
educator guide - Michigan Science Center
... universe. Recent discoveries have shown, however, that there are many more red dwarf stars than expected. This makes our star brighter than about 85% of all stars. This shouldn’t be taken to mean it is close to the brightest stars out there. In fact, the brightest (and most massive) known star, R136 ...
... universe. Recent discoveries have shown, however, that there are many more red dwarf stars than expected. This makes our star brighter than about 85% of all stars. This shouldn’t be taken to mean it is close to the brightest stars out there. In fact, the brightest (and most massive) known star, R136 ...
Earth flies between sun and Jupiter on June 5
... of atoms, 75/25% by mass) with traces of methane, water, ammonia and "rock". This is very close to the composition of the primordial Solar Nebula from which the entire solar system was formed. Saturn has a similar composition, but Uranus and Neptune have much less hydrogen and helium. Our knowledge ...
... of atoms, 75/25% by mass) with traces of methane, water, ammonia and "rock". This is very close to the composition of the primordial Solar Nebula from which the entire solar system was formed. Saturn has a similar composition, but Uranus and Neptune have much less hydrogen and helium. Our knowledge ...
The Detection and Characterization of Extrasolar Planets
... Abstract: We have now confirmed the existence of > 1800 planets orbiting stars other than the Sun; known as extrasolar planets or exoplanets. The different methods for detecting such planets are sensitive to different regions of parameter space, and so, we are discovering a wide diversity of exoplan ...
... Abstract: We have now confirmed the existence of > 1800 planets orbiting stars other than the Sun; known as extrasolar planets or exoplanets. The different methods for detecting such planets are sensitive to different regions of parameter space, and so, we are discovering a wide diversity of exoplan ...
Earth in space - Deakin University Blogs
... ‘separation distance’). The greater the mass, the greater the force; however, the greater the separation distance, the less the gravity. Gravity on the Moon is less than gravity on Earth because the Moon weighs less than Earth. In space stations and shuttles there is still a significant amount of gr ...
... ‘separation distance’). The greater the mass, the greater the force; however, the greater the separation distance, the less the gravity. Gravity on the Moon is less than gravity on Earth because the Moon weighs less than Earth. In space stations and shuttles there is still a significant amount of gr ...
More detailed notes - Particle Physics and Particle Astrophysics
... neon mixture. The helium white dwarfs are formed in close binaries as a consequence of mass transfer (see Vik Dhillon’s seminar); very-low-mass stars, which never get hot enough to fuse helium, will also eventually make helium white dwarfs, but their main-sequence lifetimes are trillions of years. T ...
... neon mixture. The helium white dwarfs are formed in close binaries as a consequence of mass transfer (see Vik Dhillon’s seminar); very-low-mass stars, which never get hot enough to fuse helium, will also eventually make helium white dwarfs, but their main-sequence lifetimes are trillions of years. T ...
Lesson Plan A2 The Year and Seasons
... differences between the Northern and Southern Hemispheres. It will show how the changing height of the Sun in the sky is connected to the changing hours of daylight through the year. 1. Returning to the globe, observe how the lamp illuminates its sphere. Make sure the globe is properly tilted in its ...
... differences between the Northern and Southern Hemispheres. It will show how the changing height of the Sun in the sky is connected to the changing hours of daylight through the year. 1. Returning to the globe, observe how the lamp illuminates its sphere. Make sure the globe is properly tilted in its ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.