Understanding the H-R Diagram
... Most stars fall into the Main Sequence range, including our sun. They are stable and remain at this stage for about 5 billion years. However, when stars begin to die they become giants and supergiants and they have used up their supply of hydrogen used in the process of nuclear fusion. The core of t ...
... Most stars fall into the Main Sequence range, including our sun. They are stable and remain at this stage for about 5 billion years. However, when stars begin to die they become giants and supergiants and they have used up their supply of hydrogen used in the process of nuclear fusion. The core of t ...
Enhanced lithium depletion in Sun-like stars with orbiting planets.
... targets. It is known19 that chromospheric activity correlates with stellar rotation (vsini). If the planet hosts were older than the comparison sample, their rotational velocities would be smaller than in the comparison sample. This is not observed either (Fig 2b), adding support to our previous con ...
... targets. It is known19 that chromospheric activity correlates with stellar rotation (vsini). If the planet hosts were older than the comparison sample, their rotational velocities would be smaller than in the comparison sample. This is not observed either (Fig 2b), adding support to our previous con ...
Equilibrium Tides
... the moon and the centrifugal force of earth’s revolution. The former is given by Newton’s law of gravitation, in which the force is proportional to the product to the masses of the earth and the moon, and is inversely proportional to the distance between the two. The latter is given by the mass of t ...
... the moon and the centrifugal force of earth’s revolution. The former is given by Newton’s law of gravitation, in which the force is proportional to the product to the masses of the earth and the moon, and is inversely proportional to the distance between the two. The latter is given by the mass of t ...
The Milky Way Galaxy
... Stars form from dense gas in molecular clouds Stars age and then give up their outer layers (via solar wind, planetary nebula, or supernova) The ejected gas eventually finds its way back into an overly dense region and become part of the next generation of stars. This process is repeated as long as ...
... Stars form from dense gas in molecular clouds Stars age and then give up their outer layers (via solar wind, planetary nebula, or supernova) The ejected gas eventually finds its way back into an overly dense region and become part of the next generation of stars. This process is repeated as long as ...
Letter of Intent for submission of a Mission Proposal for a Flexi
... equilibrium state of the solar wind. It is most conspicuous near solar minimum, when it emanates steadily from the magnetically open coronal holes around the poles, whereas the slow wind originates in an unsteady fashion from the equatorial streamers. These are for most of the time magnetically clos ...
... equilibrium state of the solar wind. It is most conspicuous near solar minimum, when it emanates steadily from the magnetically open coronal holes around the poles, whereas the slow wind originates in an unsteady fashion from the equatorial streamers. These are for most of the time magnetically clos ...
honors earth science - Grosse Pointe Public School System
... 3. Recognize moon phases from photos and diagrams (earth-moon-sun). Predict moon phases from dates 4. Compare and contrast solar and lunar eclipses. 5. Explain the cause of tides. 6. Relate tides to moon phases (spring, neap, normal) 7. Explain why we do not see the “far side” of the moon from earth ...
... 3. Recognize moon phases from photos and diagrams (earth-moon-sun). Predict moon phases from dates 4. Compare and contrast solar and lunar eclipses. 5. Explain the cause of tides. 6. Relate tides to moon phases (spring, neap, normal) 7. Explain why we do not see the “far side” of the moon from earth ...
Slides from the talk
... between WIMP-nucleus in the White Dwarfs…. …but this not true (CK, Tinyakov „10) because the potential energy is much larger than the asymptotic kinetic energy of the WIMP. WIMPs are almost relativistic while entering the Whit Dwarf. ...
... between WIMP-nucleus in the White Dwarfs…. …but this not true (CK, Tinyakov „10) because the potential energy is much larger than the asymptotic kinetic energy of the WIMP. WIMPs are almost relativistic while entering the Whit Dwarf. ...
Extreme Optics and the Search for Earth-Like Planets
... In order to have a large enough sample of stars to survey, we need to consider stars out to say 40 light years. That gives a sample of about 1000 stars. Consider for a moment how our own Solar System would look if we could step away and look back at it from a distance of 10 parsecs (i.e., 33 light y ...
... In order to have a large enough sample of stars to survey, we need to consider stars out to say 40 light years. That gives a sample of about 1000 stars. Consider for a moment how our own Solar System would look if we could step away and look back at it from a distance of 10 parsecs (i.e., 33 light y ...
Jovian Planet Systems
... prograde (in the same direction as planet rotates) • Formed in orbit around jovian planets © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... prograde (in the same direction as planet rotates) • Formed in orbit around jovian planets © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
Magnitude of Stars - What`s Out Tonight?
... yearly, the stars don’t move. They only appear that passes through both the north and south to move and change in the sky because of the poles. Any spinning object has an axis that it Earth’s turning and circling. Think of the stars rotates about. Spin a small object and you will as the pictures and ...
... yearly, the stars don’t move. They only appear that passes through both the north and south to move and change in the sky because of the poles. Any spinning object has an axis that it Earth’s turning and circling. Think of the stars rotates about. Spin a small object and you will as the pictures and ...
Pluto
... Pluto is the tiniest planet in our solar system It is about 2080 kilometers in diameter which is about one-sixth the diameter of the earth Many moons of the other planets are larger than Pluto (If Earth was a soccer ball, Pluto would be a ...
... Pluto is the tiniest planet in our solar system It is about 2080 kilometers in diameter which is about one-sixth the diameter of the earth Many moons of the other planets are larger than Pluto (If Earth was a soccer ball, Pluto would be a ...
Lecture 11
... – Hot gas in accretion disks can emit X-rays – The accretion disk can dump material which may become hot and dense enough to under nuclear fusion. • What is a white dwarf supernova – White dwarf accretes gas from companion until it exceeds 1.4 solar masses – which undergoes collapse and destruct ...
... – Hot gas in accretion disks can emit X-rays – The accretion disk can dump material which may become hot and dense enough to under nuclear fusion. • What is a white dwarf supernova – White dwarf accretes gas from companion until it exceeds 1.4 solar masses – which undergoes collapse and destruct ...
student instruction and answer sheet
... have planets or planet systems around them. Recent discoveries of numerous extrasolar planets suggest that most stars like our Sun probably have planets. ne –This number represents how many "earth-like planets" there are at the right temperature for liquid water to exist (i.e. in the habitable zone) ...
... have planets or planet systems around them. Recent discoveries of numerous extrasolar planets suggest that most stars like our Sun probably have planets. ne –This number represents how many "earth-like planets" there are at the right temperature for liquid water to exist (i.e. in the habitable zone) ...
Comets In 2013 - WordPress.com
... Now introduce the idea of other objects in orbit around the Sun. What else circles the Sun? Other planets - some are closer to the Sun and travel more quickly. For example it takes Mercury less than 3 months to complete one trip around the Sun. That’s the same amount of time it takes us to get just ...
... Now introduce the idea of other objects in orbit around the Sun. What else circles the Sun? Other planets - some are closer to the Sun and travel more quickly. For example it takes Mercury less than 3 months to complete one trip around the Sun. That’s the same amount of time it takes us to get just ...
Sky-High 2015 - Irish Astronomical Society
... zenith and then continues on down to the southern point of the horizon. The NCP is less than one degree from Polaris, the Pole Star. Venus and Mercury show phases like the Moon. Mars can look gibbous, i.e. not quite full. Jupiter can show very slightly less than full at quadrature (i.e. when 90° fro ...
... zenith and then continues on down to the southern point of the horizon. The NCP is less than one degree from Polaris, the Pole Star. Venus and Mercury show phases like the Moon. Mars can look gibbous, i.e. not quite full. Jupiter can show very slightly less than full at quadrature (i.e. when 90° fro ...
nebula - Harding University
... formation and of the presence of disk-like structures surrounding these new stars. The four massive stars that dominate this region are emitting radiation and gasses which are interacting with the smaller young stars being formed. These stellar winds may prevent the formation of possible solar sys ...
... formation and of the presence of disk-like structures surrounding these new stars. The four massive stars that dominate this region are emitting radiation and gasses which are interacting with the smaller young stars being formed. These stellar winds may prevent the formation of possible solar sys ...
Chap1-Introduction - Groupe d`astrophysique de UdeM
... Number Nearly 2000 firm detections, several 1000s of candidates. • About half are transiting systems. ...
... Number Nearly 2000 firm detections, several 1000s of candidates. • About half are transiting systems. ...
sections 16-18 instructor notes
... v. by determining the peculiar velocity of the Sun relative to nearby galaxies in the Local Group. It is not as simple a task as it might seem, owing to the intrinsic velocities of other galaxies in the system. An estimate of the local circular velocity from such an analysis is that of Arp (A&A, 15 ...
... v. by determining the peculiar velocity of the Sun relative to nearby galaxies in the Local Group. It is not as simple a task as it might seem, owing to the intrinsic velocities of other galaxies in the system. An estimate of the local circular velocity from such an analysis is that of Arp (A&A, 15 ...
Using Star Charts
... Earth’s orbit of the sun, so as we pass them they seem to slow down, turn around and go backwards. This is only an optical illusion due to the relative motions, but was quite confusing to early astronomer who spent a great deal of time trying to explain this motion. Their task was complicated by the ...
... Earth’s orbit of the sun, so as we pass them they seem to slow down, turn around and go backwards. This is only an optical illusion due to the relative motions, but was quite confusing to early astronomer who spent a great deal of time trying to explain this motion. Their task was complicated by the ...
Chapter 1: The Sun - New Hampshire Public Television
... helium-three. Then, by fusing again with an identical trio, they become - in a flash - helium-four. They emit the two extra hydrogen nuclei - and more energy. The mass of the helium-four nucleus is 0.7 percent less than the combined mass of the four component hydrogen nuclei from which it is assembl ...
... helium-three. Then, by fusing again with an identical trio, they become - in a flash - helium-four. They emit the two extra hydrogen nuclei - and more energy. The mass of the helium-four nucleus is 0.7 percent less than the combined mass of the four component hydrogen nuclei from which it is assembl ...
The Galilean Moons of Jupiter
... Mokusei (Japanese for Jupiter) is shareware for the purpose of simulating the motions of the Galilean Moons of Jupiter. The application also provides static and dynamic data about the Jupiter system which is of special interest to amateur astronomers because of its fast changes and suitability to bo ...
... Mokusei (Japanese for Jupiter) is shareware for the purpose of simulating the motions of the Galilean Moons of Jupiter. The application also provides static and dynamic data about the Jupiter system which is of special interest to amateur astronomers because of its fast changes and suitability to bo ...
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.