Fulltext PDF - Indian Academy of Sciences
... angle of about 23°26'21" from its orbital plane. Thus the celestial equator (which determines time measurements) and the ecliptic make a considerable angle (23°26'21"). Due to these two factors, the duration of a solar day is not uniform. One therefore considers the mean solar day (madhya siivana di ...
... angle of about 23°26'21" from its orbital plane. Thus the celestial equator (which determines time measurements) and the ecliptic make a considerable angle (23°26'21"). Due to these two factors, the duration of a solar day is not uniform. One therefore considers the mean solar day (madhya siivana di ...
Slide 1
... From a solution from the Schwarzchild solution to Einstein’s Space-time field equations: This solution takes a mathematical form called a “metric” that describes the Geometry of space-time around a mass. One can derive the red shift of a photon escaping a mass starting at r1=R and at a distance r2 = ...
... From a solution from the Schwarzchild solution to Einstein’s Space-time field equations: This solution takes a mathematical form called a “metric” that describes the Geometry of space-time around a mass. One can derive the red shift of a photon escaping a mass starting at r1=R and at a distance r2 = ...
Your web browser (Safari 7) - National Geographic Society
... molecular cloud began to compress, and some regions of gas collapsed under their own gravitational pull. As one of these regions collapsed, it also began to rotate and heat up from increasing pressure. Much of the hydrogen and helium remained in the center of this hot, rotating mass. Eventually, the ...
... molecular cloud began to compress, and some regions of gas collapsed under their own gravitational pull. As one of these regions collapsed, it also began to rotate and heat up from increasing pressure. Much of the hydrogen and helium remained in the center of this hot, rotating mass. Eventually, the ...
Seasons activities (PDF 364KB)
... Planets that have a long rotation time (eg. Mercury) have a much longer daytime and night-time than planets with a short rotation time (eg. Jupiter). If the Sun is in the sky for a long time, that half of the planet will tend to become much hotter than if the Sun is in the sky for a short time. Simi ...
... Planets that have a long rotation time (eg. Mercury) have a much longer daytime and night-time than planets with a short rotation time (eg. Jupiter). If the Sun is in the sky for a long time, that half of the planet will tend to become much hotter than if the Sun is in the sky for a short time. Simi ...
Eris en Dysnomia
... The largest known KBO (Kuiper Belt Object), 2003 UB313, as imaged at three different times on October 21 of 2003, by the Palomar 48-inch Schmidt telescope. Curently about 19th magnitude, the object is near aphelion, 97 AUs (about 9 billion miles), or about twice as far as Pluto, from the Sun. Origin ...
... The largest known KBO (Kuiper Belt Object), 2003 UB313, as imaged at three different times on October 21 of 2003, by the Palomar 48-inch Schmidt telescope. Curently about 19th magnitude, the object is near aphelion, 97 AUs (about 9 billion miles), or about twice as far as Pluto, from the Sun. Origin ...
DTU_9e_ch08 - University of San Diego Home Pages
... found at Titan’s north pole. The Huygens probe took the image on the right at Titan’s surface on January 14, 2005. What appear like boulders here are actually pebbles strewn around the landscape. The biggest ones are about 15 cm (6 in.) across. ...
... found at Titan’s north pole. The Huygens probe took the image on the right at Titan’s surface on January 14, 2005. What appear like boulders here are actually pebbles strewn around the landscape. The biggest ones are about 15 cm (6 in.) across. ...
October 2014 - Newbury Astronomical Society
... Sun its outer layers would extend to half way between the orbits of Mars and Jupiter. It is so big that it is the only star that can be seen as a disc using giant telescopes. However the surface temperature is cool for a star at 3100°K when compared with the brighter surface of our Sun at 5500°K and ...
... Sun its outer layers would extend to half way between the orbits of Mars and Jupiter. It is so big that it is the only star that can be seen as a disc using giant telescopes. However the surface temperature is cool for a star at 3100°K when compared with the brighter surface of our Sun at 5500°K and ...
Special Session 11 From solar physics to astrophysics: the Sun as
... dynamics of the solar atmosphere. Unfortunately, the long periods and shallow propagation angles of these waves have made them hard to detect and characterize and they have received scant attention. Despite these difficulties, recent observations confirm their presence in the solar atmosphere and ve ...
... dynamics of the solar atmosphere. Unfortunately, the long periods and shallow propagation angles of these waves have made them hard to detect and characterize and they have received scant attention. Despite these difficulties, recent observations confirm their presence in the solar atmosphere and ve ...
Neptune: The Last Gas Giant
... Seasonal heating from the sun causes eruptions of liquid nitrogen, dust and methane The surface of Triton is only 34.5K at this temperature methane, nitrogen, and carbon dioxide all freeze The surface also has few craters, inferring that the crust is relatively young. It is also the largest moon to ...
... Seasonal heating from the sun causes eruptions of liquid nitrogen, dust and methane The surface of Triton is only 34.5K at this temperature methane, nitrogen, and carbon dioxide all freeze The surface also has few craters, inferring that the crust is relatively young. It is also the largest moon to ...
DAY AND NIGHT, SEASONS
... For planets with an axial tilt life may only be able to survive if it migrates back and forth between cooler and hotter regions throughout its year-long day. 2: A planet with an eccentric orbit. Planets move in elliptical orbits, with the star at one focus. You could introduce this concept using tw ...
... For planets with an axial tilt life may only be able to survive if it migrates back and forth between cooler and hotter regions throughout its year-long day. 2: A planet with an eccentric orbit. Planets move in elliptical orbits, with the star at one focus. You could introduce this concept using tw ...
PPT
... Today the Sun is “in” a particular constellation, next month in a different one, etc. Sun’s path on the celestial sphere = ecliptic Constellations through which the ecliptic runs = ...
... Today the Sun is “in” a particular constellation, next month in a different one, etc. Sun’s path on the celestial sphere = ecliptic Constellations through which the ecliptic runs = ...
Could there be life on exoplanets? No room for complacency
... planet by one or more larger planets in exterior orbits. By implication, the orbit of the larger planet must have a semi-major axis at least as large as 2 AU and preferably rather larger. With the solar system in mind, interest now is with companions of this semi-major axis and of mass broadly compa ...
... planet by one or more larger planets in exterior orbits. By implication, the orbit of the larger planet must have a semi-major axis at least as large as 2 AU and preferably rather larger. With the solar system in mind, interest now is with companions of this semi-major axis and of mass broadly compa ...
Chapter 2
... good approximation to the orbits of the Sun and the Moon, but it could not account for the observed variations in planetary brightness or the retrograde motion of the planets. A more complex model was needed to describe these heavenly “wanderers.” In the first step toward this new model, each planet ...
... good approximation to the orbits of the Sun and the Moon, but it could not account for the observed variations in planetary brightness or the retrograde motion of the planets. A more complex model was needed to describe these heavenly “wanderers.” In the first step toward this new model, each planet ...
Talk
... Shell helium and hydrogen fusion (asymptotic giant phase) White dwarf phase, fusion completed This series of stages is similar for all stars with initial masses in the range 0.4 – 4.0 MŸ. More massive stars are able to start fusion reactions involving carbon and oxygen Ø next week. ...
... Shell helium and hydrogen fusion (asymptotic giant phase) White dwarf phase, fusion completed This series of stages is similar for all stars with initial masses in the range 0.4 – 4.0 MŸ. More massive stars are able to start fusion reactions involving carbon and oxygen Ø next week. ...
Planetary Orbit Simulator – Student Guide
... aligned horizontally for all elliptical orbits created in this simulator, where they are randomly aligned in our solar system. ...
... aligned horizontally for all elliptical orbits created in this simulator, where they are randomly aligned in our solar system. ...
Chapter 28 Stars and Their Characteristics
... • Visible white light is actually made up of light of various colors, each with a different wavelength. (colors seen in rainbow or when light passes through a triangular prism.) – Red light has the longest wavelength, violet has the ...
... • Visible white light is actually made up of light of various colors, each with a different wavelength. (colors seen in rainbow or when light passes through a triangular prism.) – Red light has the longest wavelength, violet has the ...
Become a Member - Department of Physics and Astronomy
... that the total quantity of hydrogen is grossly underrepresented by the Balmer absorption. A similar argument holds for helium. She found similar results for other stars. Payne concluded that, unlike on Earth, hydrogen and helium are the dominant elements of the Sun and stars. Henry Norris Russell st ...
... that the total quantity of hydrogen is grossly underrepresented by the Balmer absorption. A similar argument holds for helium. She found similar results for other stars. Payne concluded that, unlike on Earth, hydrogen and helium are the dominant elements of the Sun and stars. Henry Norris Russell st ...
PPT - Lick Observatory
... – Very accurate naked-eye observations of positions of planets and stars – Persisted for three decades, kept careful records – Couldn’t explain why his data looked the way they did, but he hired a young apprentice who did explain it: ...
... – Very accurate naked-eye observations of positions of planets and stars – Persisted for three decades, kept careful records – Couldn’t explain why his data looked the way they did, but he hired a young apprentice who did explain it: ...
NCEA Level 2 Earth and Space Science (91192)
... After the Sun had formed, there were leftover gas and dust particles. These particles began to rotate around the young sun and flattened into a disk shape called a protoplanetary disk. Inside the swirling disk, rocky particles began to collide and formed bigger masses. This increase in mass attracte ...
... After the Sun had formed, there were leftover gas and dust particles. These particles began to rotate around the young sun and flattened into a disk shape called a protoplanetary disk. Inside the swirling disk, rocky particles began to collide and formed bigger masses. This increase in mass attracte ...
NCEA Level 2 Earth and Space Science (91192) 2013
... After the Sun had formed, there were leftover gas and dust particles. These particles began to rotate around the young sun and flattened into a disk shape called a protoplanetary disk. Inside the swirling disk, rocky particles began to collide and formed bigger masses. This increase in mass attracte ...
... After the Sun had formed, there were leftover gas and dust particles. These particles began to rotate around the young sun and flattened into a disk shape called a protoplanetary disk. Inside the swirling disk, rocky particles began to collide and formed bigger masses. This increase in mass attracte ...
Lecture 09a: Habitable zones - Sierra College Astronomy Home Page
... forms. In a small survey of part of the sky, 10 have been found. This means there could be more than 100 billion in our whole galaxy. Numbers suggest only a small fraction formed alone in space. Most were ejected from their systems. ...
... forms. In a small survey of part of the sky, 10 have been found. This means there could be more than 100 billion in our whole galaxy. Numbers suggest only a small fraction formed alone in space. Most were ejected from their systems. ...
Stellar Evolution: Evolution: Birth, Life, and Death of Stars
... The stars are formed inside the parts of a nebula called nuclei, which are dense or compressed. Gravity is responsible for attraction of nuclei. The conservation of angular momentum increases the rotation of the nuclei, which become flattened and finally convert into the discs. Stars are formed in t ...
... The stars are formed inside the parts of a nebula called nuclei, which are dense or compressed. Gravity is responsible for attraction of nuclei. The conservation of angular momentum increases the rotation of the nuclei, which become flattened and finally convert into the discs. Stars are formed in t ...
Lecture 6: Planet migration
... critical planet mass q & 10−4 –10−3 . We therefore see that for a solar-mass star, planets of Jupiter mass are expected to migrate in the Type II regime, while Neptune-mass objects undergo Type I migration. Saturn-mass planets lie close to the critical mass for gap-opening, and in practice are likel ...
... critical planet mass q & 10−4 –10−3 . We therefore see that for a solar-mass star, planets of Jupiter mass are expected to migrate in the Type II regime, while Neptune-mass objects undergo Type I migration. Saturn-mass planets lie close to the critical mass for gap-opening, and in practice are likel ...
Astronomy Test over Jovian Planets
... 2. Which of the following planets is similar to Uranus in terms of its size and mass? a. Pluto c. Saturn b. Neptune d. Jupiter 3. The least dense planet in the solar system is a. Jupiter c. Saturn b. Neptune d. Uranus 4. The smallest Jovian planet in the solar system is a. Jupiter c. Saturn b. Neptu ...
... 2. Which of the following planets is similar to Uranus in terms of its size and mass? a. Pluto c. Saturn b. Neptune d. Jupiter 3. The least dense planet in the solar system is a. Jupiter c. Saturn b. Neptune d. Uranus 4. The smallest Jovian planet in the solar system is a. Jupiter c. Saturn b. Neptu ...
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.