The Sun: Source of heat and light
... The lightyear is a particularly useful unit because it reminds us that what we see actually happened a while back, when the light left the star (or planet) that we are looking at. Let’s imagine that three stars A, B and C are all “born” at about the same time. Because the stars are at different dist ...
... The lightyear is a particularly useful unit because it reminds us that what we see actually happened a while back, when the light left the star (or planet) that we are looking at. Let’s imagine that three stars A, B and C are all “born” at about the same time. Because the stars are at different dist ...
Ans. - Testlabz.com
... Ans. The pole star is situated in the north direction, which is directly above the geographic north-pole of the earth’s axis. Its position with respect to earth does not change, and hence, it appears stationary. An imaginary straight line starting from pole star and point in the direction of last tw ...
... Ans. The pole star is situated in the north direction, which is directly above the geographic north-pole of the earth’s axis. Its position with respect to earth does not change, and hence, it appears stationary. An imaginary straight line starting from pole star and point in the direction of last tw ...
transit observations of new planets
... this was done for planets within our solar system. Now this search has expanded to include a much greater area our galaxy. One way in which the search is conducted is via the “Transit” method. A transit occurs when an object passes in front of a star. When this happens, some of the light coming from ...
... this was done for planets within our solar system. Now this search has expanded to include a much greater area our galaxy. One way in which the search is conducted is via the “Transit” method. A transit occurs when an object passes in front of a star. When this happens, some of the light coming from ...
Activity I: Plotting a Light Curve due to a Transit
... this dip in intensity repeated every 3.52 days. From the drop in intensity and the length of the period we can tell a number of things about the planet. The drop in intensity can lead us to tell the size of the planet and thus, if it is large enough to hold an atmosphere. The period of the planet wi ...
... this dip in intensity repeated every 3.52 days. From the drop in intensity and the length of the period we can tell a number of things about the planet. The drop in intensity can lead us to tell the size of the planet and thus, if it is large enough to hold an atmosphere. The period of the planet wi ...
Precession of Earth
... changes the stars near the Pole; It does not affect the seasons. Nutation is the wobbling during precession; 1/2° one way or the other; period of 18 years; due to the Moon; It slightly effects seasons. This type of axis movement is similar to that of a spinning top. As the top slows, the axis of rot ...
... changes the stars near the Pole; It does not affect the seasons. Nutation is the wobbling during precession; 1/2° one way or the other; period of 18 years; due to the Moon; It slightly effects seasons. This type of axis movement is similar to that of a spinning top. As the top slows, the axis of rot ...
Photosphere
... • 3 clicker points for 10 best answers that can be repeated in class. • Enter in Angel before ...
... • 3 clicker points for 10 best answers that can be repeated in class. • Enter in Angel before ...
2.4 Statistical properties of radial velocity planets
... Statistical results presented in this and the following section are mainly from the review paper of Udry and Santos (2007, Ann Rev. Astron. & Astrophys. 45, 397) and the preprint from Mayor et al. (2011, arXiv:1109.2497v1). Because of the rapid progress in this field many of the presented results wi ...
... Statistical results presented in this and the following section are mainly from the review paper of Udry and Santos (2007, Ann Rev. Astron. & Astrophys. 45, 397) and the preprint from Mayor et al. (2011, arXiv:1109.2497v1). Because of the rapid progress in this field many of the presented results wi ...
You in Outer Space Curriculum Map
... 5. Some planets have more moons than others. 6. Humans have been able to explore the Earth’s moon and Mars. 7. All planets have weather and natural disasters that are a result of systems interacting. 8. Questions about planetary alignment have been discussed since before Aristotle and Galileo’s time ...
... 5. Some planets have more moons than others. 6. Humans have been able to explore the Earth’s moon and Mars. 7. All planets have weather and natural disasters that are a result of systems interacting. 8. Questions about planetary alignment have been discussed since before Aristotle and Galileo’s time ...
Unit 3 - Section 8.9 Life of Stars
... It is red because it is cooler than a Main Sequence Star. It is a giant because the outer shell has expanded outward. In the core of the Red Giant, helium fuses into carbon. All stars evolve the same way to the Red Giant phase. The amount of mass a star has determines which life cycle path it ...
... It is red because it is cooler than a Main Sequence Star. It is a giant because the outer shell has expanded outward. In the core of the Red Giant, helium fuses into carbon. All stars evolve the same way to the Red Giant phase. The amount of mass a star has determines which life cycle path it ...
phys-1600 - Dave Heppenstall
... • Galileo discovered the four largest moons orbiting Jupiter: Io, Europa, Ganymede and Calisto. • In Io's case, there are immense volcanoes which are constantly being churned inside out and renewing its surface. This is due to the close proximity to Jupiter and the enormous gravitational force. • Io ...
... • Galileo discovered the four largest moons orbiting Jupiter: Io, Europa, Ganymede and Calisto. • In Io's case, there are immense volcanoes which are constantly being churned inside out and renewing its surface. This is due to the close proximity to Jupiter and the enormous gravitational force. • Io ...
day04
... • Edmond Halley predicted a comet would return in 1758 and every 76 years after that. (seen in 1910, 1986, and will return in 2061) Halley’s comet has an elliptical orbit extending out past Neptune. • William Herschel discovered Uranus in 1781 by accident. • After 50 years it was seen to deviate fro ...
... • Edmond Halley predicted a comet would return in 1758 and every 76 years after that. (seen in 1910, 1986, and will return in 2061) Halley’s comet has an elliptical orbit extending out past Neptune. • William Herschel discovered Uranus in 1781 by accident. • After 50 years it was seen to deviate fro ...
Luminosity and brightness
... Luminosity is a measure of the total energy given output by a star at all wavelengths form gamma radiation to radio waves. For example the Sun gives out about 500 million million million MJ of energy every second so its luminosity is 500 million million million MJ. The luminosity depends on: (a) the ...
... Luminosity is a measure of the total energy given output by a star at all wavelengths form gamma radiation to radio waves. For example the Sun gives out about 500 million million million MJ of energy every second so its luminosity is 500 million million million MJ. The luminosity depends on: (a) the ...
KS3 Physics – The Solar System
... KS3 Physics – The Solar System – Learning Objectives NB. Some areas of this topic may be omitted due to time constraints. ...
... KS3 Physics – The Solar System – Learning Objectives NB. Some areas of this topic may be omitted due to time constraints. ...
Doppler Effect - SAVE MY EXAMS!
... The Andromeda galaxy is believed to be approaching the Milky Way at a speed of 105 km s–1. Calculate the wavelength of the radio waves produced by atomic hydrogen which would be detected from a source approaching the observer at a speed of 105 km s–1. wavelength of atomic hydrogen measured in a labo ...
... The Andromeda galaxy is believed to be approaching the Milky Way at a speed of 105 km s–1. Calculate the wavelength of the radio waves produced by atomic hydrogen which would be detected from a source approaching the observer at a speed of 105 km s–1. wavelength of atomic hydrogen measured in a labo ...
Chapter 13 - USM People Pages
... are not necessarily integers. Define x = log u and y = log v. Find an expression for y in terms of x. b. What shape will a graph of y versus x have? Explain. c. What slope will a graph of y versus x have? Explain. d. Use the experimentally determined “best-fit” line in Figure 13.17 to find the mass ...
... are not necessarily integers. Define x = log u and y = log v. Find an expression for y in terms of x. b. What shape will a graph of y versus x have? Explain. c. What slope will a graph of y versus x have? Explain. d. Use the experimentally determined “best-fit” line in Figure 13.17 to find the mass ...
Foundation 1 - Discovering Astronomy
... When core hydrogen fusion ceases, a main-sequence star becomes a giant • When hydrogen fusion ceases in the core, the star will collapse inward – this causes the layer just outside the core to become so hot and dense that hydrogen fusion will begin in this outer layer. • The energy produced by hydr ...
... When core hydrogen fusion ceases, a main-sequence star becomes a giant • When hydrogen fusion ceases in the core, the star will collapse inward – this causes the layer just outside the core to become so hot and dense that hydrogen fusion will begin in this outer layer. • The energy produced by hydr ...
Advances in Environmental Biology Approach Mahin Shahrivar and
... ton of this produces Helium and the left 4 million ton as 0.7% is the consumptive case and the same left degree is changed to the energy publishing as the light and heat [16]. Our sun is about 5 milliard years old and about 4.5 milliard years later it will be ended up by consumption its hydrogen; in ...
... ton of this produces Helium and the left 4 million ton as 0.7% is the consumptive case and the same left degree is changed to the energy publishing as the light and heat [16]. Our sun is about 5 milliard years old and about 4.5 milliard years later it will be ended up by consumption its hydrogen; in ...
PowerPoint プレゼンテーション
... separation is made because of different deformational properties in the mantle inferred from seismic wave measurements. (1) The upper layer is stiff. It is presumed that if the entire mantle had been as stiff, the outer shell of the earth would stay put. This stiff layer of the mantle and the overly ...
... separation is made because of different deformational properties in the mantle inferred from seismic wave measurements. (1) The upper layer is stiff. It is presumed that if the entire mantle had been as stiff, the outer shell of the earth would stay put. This stiff layer of the mantle and the overly ...
main sequence
... This radius enfolds the singularity in a zone of blackness - in other words, it makes a black hole black. It gives the black hole a visible surface, which is known as the event horizon. This is not a solid surface, though. It is simply the "point of no return" for anything that approaches the black ...
... This radius enfolds the singularity in a zone of blackness - in other words, it makes a black hole black. It gives the black hole a visible surface, which is known as the event horizon. This is not a solid surface, though. It is simply the "point of no return" for anything that approaches the black ...
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. ...
LECTURE 1
... 1.5.1 The Early Earth The Early Earth was very different from what it is today. It lacked the modern oceans and atmosphere and had a different surface from the present one. The primitive Earth was heated by several processes. Immediately after the Earth formed, the energy released by the decay of ra ...
... 1.5.1 The Early Earth The Early Earth was very different from what it is today. It lacked the modern oceans and atmosphere and had a different surface from the present one. The primitive Earth was heated by several processes. Immediately after the Earth formed, the energy released by the decay of ra ...
Celestial Motions - Stony Brook Astronomy
... Imagine you are standing at the North Pole. Of the stars that you can see, roughly how many of these stars are circumpolar? a) None b) Less than half c) More than half d) All e) Not enough information ...
... Imagine you are standing at the North Pole. Of the stars that you can see, roughly how many of these stars are circumpolar? a) None b) Less than half c) More than half d) All e) Not enough information ...
ASTR 105 Intro Astronomy: The Solar System
... Our view from Stony Brook • Stars near the north celestial pole are circumpolar and never set. • We cannot see stars near the south celestial pole. • All other stars (and Sun, Moon, planets) rise in east and set in west. This star is up some of the time and down ...
... Our view from Stony Brook • Stars near the north celestial pole are circumpolar and never set. • We cannot see stars near the south celestial pole. • All other stars (and Sun, Moon, planets) rise in east and set in west. This star is up some of the time and down ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.