UV Radiation in Different Stellar Systems
... the surface of the Earth relatively unattenuated (Sagan 1973; Kasting 1993). From the biologically effective irradiance data, it could be expected that about 65% of the biological response to DNA on archean Earth is accounted for by UVC. On the other hand, Cockell (1998) showed that protection from ...
... the surface of the Earth relatively unattenuated (Sagan 1973; Kasting 1993). From the biologically effective irradiance data, it could be expected that about 65% of the biological response to DNA on archean Earth is accounted for by UVC. On the other hand, Cockell (1998) showed that protection from ...
What is a pulsar planet ? How do planets form ?
... Pulsars are generated as result of supernovae explosions of massive stars. When do planets form ? before explosions ? after explosions ? ...
... Pulsars are generated as result of supernovae explosions of massive stars. When do planets form ? before explosions ? after explosions ? ...
Observing Planetary Motion 15.3 Directions: Following the
... Scientists use powerful space-based telescopes that orbit Earth to look for wobbling stars. Since they are outside of Earth’s atmosphere, these telescopes can see the stars more clearly than telescopes on Earth’s surface. Who knows? Someday scientists may use the wobble method to discover another so ...
... Scientists use powerful space-based telescopes that orbit Earth to look for wobbling stars. Since they are outside of Earth’s atmosphere, these telescopes can see the stars more clearly than telescopes on Earth’s surface. Who knows? Someday scientists may use the wobble method to discover another so ...
Archaeologists Say the `Anthropocene` Is Here—But It Began Long
... craft’s only job, after all, is to determine how zone requires some big assumptions. CalcuTo characterize the atmospheres of potenoften Earth-size planets orbit in the habit- lating how much of its star’s radiant energy tially habitable exoplanets, astronomers able zone of sunlike stars. And it has ...
... craft’s only job, after all, is to determine how zone requires some big assumptions. CalcuTo characterize the atmospheres of potenoften Earth-size planets orbit in the habit- lating how much of its star’s radiant energy tially habitable exoplanets, astronomers able zone of sunlike stars. And it has ...
The closest extrasolar planet: A giant planet around the M4 dwarf Gl
... to zero for the final solution. Figure 1 shows the individual radial velocity measurements as a function of orbital phase (the 16 orbital periods elapsed since the first measurement make unpractical a display as a function of time; we however have essentially continuous coverage of one period in Jun ...
... to zero for the final solution. Figure 1 shows the individual radial velocity measurements as a function of orbital phase (the 16 orbital periods elapsed since the first measurement make unpractical a display as a function of time; we however have essentially continuous coverage of one period in Jun ...
Exoplanets for Amateur Astronomers
... (July 7,2005) “…on June 30th, California amateur astronomer Ron Bissinger detected a partial transit of planet HD 149026b. He also detected partial transits during the next two opportunities, allowing him to produce a composite light curve of an entire event. This new find is now the third transitin ...
... (July 7,2005) “…on June 30th, California amateur astronomer Ron Bissinger detected a partial transit of planet HD 149026b. He also detected partial transits during the next two opportunities, allowing him to produce a composite light curve of an entire event. This new find is now the third transitin ...
Unit 1: Astronomy Project
... Many of these quantities are dependent on each other. For example, if you love snowboarding, and so decide your planet will be perpetually snow-covered, this will affect the reflectivity which will in turn affect both the temperature and which atoms and molecules will be retained in the atmosphere; ...
... Many of these quantities are dependent on each other. For example, if you love snowboarding, and so decide your planet will be perpetually snow-covered, this will affect the reflectivity which will in turn affect both the temperature and which atoms and molecules will be retained in the atmosphere; ...
What do we mean by habitable zone?
... put a planet in that star’s habitable zone (which would be farther away because the star would be much more luminous than the Sun), life would be hard-pressed to evolve much even if it managed to originate. As a reminder, the earliest traces of life on Earth go back to something like 800 million ye ...
... put a planet in that star’s habitable zone (which would be farther away because the star would be much more luminous than the Sun), life would be hard-pressed to evolve much even if it managed to originate. As a reminder, the earliest traces of life on Earth go back to something like 800 million ye ...
PH709-assn-answers
... Observable is the line of sight velocity of the star orbiting centre of mass of star - planet binary system. Direct imaging of the planets is difficult because of the enormous difference in brightness between the star and the planet, and the small angular separation between them.. If the planet has ...
... Observable is the line of sight velocity of the star orbiting centre of mass of star - planet binary system. Direct imaging of the planets is difficult because of the enormous difference in brightness between the star and the planet, and the small angular separation between them.. If the planet has ...
Where`s Earth 2.0? - Institute of Astronomy
... system, we have been searching for Earth 2.0. In this talk we’ll explore what makes our own planet Earth such a haven for life and what this really means for the habitability of Earth 2.0. We’ll be talking about our solar system, exoplanet atmospheres, why Earth is covered in water and extinction ev ...
... system, we have been searching for Earth 2.0. In this talk we’ll explore what makes our own planet Earth such a haven for life and what this really means for the habitability of Earth 2.0. We’ll be talking about our solar system, exoplanet atmospheres, why Earth is covered in water and extinction ev ...
The Family of Stars
... Transit Method • Astronomers do photometry well and can detect small, periodic changes in light level. Small telescopes can do this. • Need very close to edge-on systems, usually within a degree given planet sizes, separations, and geometry. • More than a thousand candidates here or coming (Kepler ...
... Transit Method • Astronomers do photometry well and can detect small, periodic changes in light level. Small telescopes can do this. • Need very close to edge-on systems, usually within a degree given planet sizes, separations, and geometry. • More than a thousand candidates here or coming (Kepler ...
3 Habitable Zones in Extrasolar Planetary Systems
... about habitability of moons around giant planets is given by Williams et al. [7]. The same type of stability calculations described above for the solar system with the Sun as the central star can also be performed for stars other than our Sun. Such investigations are of special importance, because w ...
... about habitability of moons around giant planets is given by Williams et al. [7]. The same type of stability calculations described above for the solar system with the Sun as the central star can also be performed for stars other than our Sun. Such investigations are of special importance, because w ...
Direct Detection of Exoplanets
... Even if we can image an Earth-like planet in the habitable zone of some star, we will not be able to resolve its surface features in the foreseeable future. (No “zooming in” to see oceans, forests, city lights… Later we’ll see how you can detect some of these through reflected light.) Instead, we mu ...
... Even if we can image an Earth-like planet in the habitable zone of some star, we will not be able to resolve its surface features in the foreseeable future. (No “zooming in” to see oceans, forests, city lights… Later we’ll see how you can detect some of these through reflected light.) Instead, we mu ...
A search for planets around intermediate Mass Stars with the Hobby
... (2007) extend to giants the correlation between planetary masses and primary mass that is observed for the lower-mass stars. This is most likely because massive stars tend to have more massive disks. These results are in accord with the core accretion scenario of planet formation (Kennedy & Kenyon 2 ...
... (2007) extend to giants the correlation between planetary masses and primary mass that is observed for the lower-mass stars. This is most likely because massive stars tend to have more massive disks. These results are in accord with the core accretion scenario of planet formation (Kennedy & Kenyon 2 ...
Final Exam - Practice questions for Unit V
... the equilibrium temperature is between the freezing and evaporation temperatures of water. the orbital period is between 0.5 and 2.0 years. orbital resonances with the largest planet in the system are impossible. high quality stereo radio reception is possible. ...
... the equilibrium temperature is between the freezing and evaporation temperatures of water. the orbital period is between 0.5 and 2.0 years. orbital resonances with the largest planet in the system are impossible. high quality stereo radio reception is possible. ...
New Corroboration of Meier`s Information Regarding Other Planets
... glowing disk in the sky when it makes its appearance from behind the sun. As if this were not enough, at the same time, also in March 1997, another large object will appear in the sky -- a gigantic comet, or tail star, 1/310 the size of Earth's diameter. This implies that the comet has a diameter of ...
... glowing disk in the sky when it makes its appearance from behind the sun. As if this were not enough, at the same time, also in March 1997, another large object will appear in the sky -- a gigantic comet, or tail star, 1/310 the size of Earth's diameter. This implies that the comet has a diameter of ...
May 8, 2012 - Plummer Pumas Science
... Consider the four characteristics (1) Temperature, (2) color, (3) distance, and (4) class or spectral type. Which characteristics most strongly influence the size and location of the habitable zone? Explain your reasoning for each. ____________________________________________________________________ ...
... Consider the four characteristics (1) Temperature, (2) color, (3) distance, and (4) class or spectral type. Which characteristics most strongly influence the size and location of the habitable zone? Explain your reasoning for each. ____________________________________________________________________ ...
On a New Primary Planet of our Solar System, Long Suspected
... However, though the probability was so great, that the reported relationship of the planetary intervals, at least as nearness to the truth could be found in the natural state, yet there were astronomers who doubted the conclusions of this [?unreadable word?] law, and, consequently, the existence of ...
... However, though the probability was so great, that the reported relationship of the planetary intervals, at least as nearness to the truth could be found in the natural state, yet there were astronomers who doubted the conclusions of this [?unreadable word?] law, and, consequently, the existence of ...
Is there life in space? Activity 4: Habitable Conditions
... A. Student answers will vary. Q. Explain what influenced your certainty rating in the last question. A. Student answers will vary. Answers may include a question of whether life needs to evolve on the planet or be imported from a passing asteroid. Page 2: Zone of Liquid Water Possibility Q. If a pla ...
... A. Student answers will vary. Q. Explain what influenced your certainty rating in the last question. A. Student answers will vary. Answers may include a question of whether life needs to evolve on the planet or be imported from a passing asteroid. Page 2: Zone of Liquid Water Possibility Q. If a pla ...
What makes a planet habitable?
... planet’s reflected light. Just by looking at that light, scientists can see the marks of oxygen, water vapor, or some other powerful indication of life. When we find life, how will we know? The answer has a lot to do with rainbows. As Isaac Newton recognized, white light is really a band of colors spa ...
... planet’s reflected light. Just by looking at that light, scientists can see the marks of oxygen, water vapor, or some other powerful indication of life. When we find life, how will we know? The answer has a lot to do with rainbows. As Isaac Newton recognized, white light is really a band of colors spa ...
The Hunt for Epsilon Eridani c to Study its Earthly
... Scientific Justification It is crucial to determine distinctly whether there is a second planet orbiting Epsilon Eridani. Not only will its features likely resemble that of earth’s, but it may also aid in the explanation of the Kuiper Belt mass distribution in our own solar system. By investigating ...
... Scientific Justification It is crucial to determine distinctly whether there is a second planet orbiting Epsilon Eridani. Not only will its features likely resemble that of earth’s, but it may also aid in the explanation of the Kuiper Belt mass distribution in our own solar system. By investigating ...
ppt
... actually much closer to 290 K Atmospheric greenhouse effect serves to keep the temperature higher (also a very tiny heating effect due to geothermal heat) ...
... actually much closer to 290 K Atmospheric greenhouse effect serves to keep the temperature higher (also a very tiny heating effect due to geothermal heat) ...
Solutions2
... at different distances from us. Star A has parallax 10−3 ”, and radius 108 m. It appears 25 times brighter than Star B. a) What are the distances to stars A and B? Star A has d=1/p”=1000 parsecs. Star B is 25 times fainter, so must be 5 times farther away (inverse square law), 5000 parsecs. b) Star ...
... at different distances from us. Star A has parallax 10−3 ”, and radius 108 m. It appears 25 times brighter than Star B. a) What are the distances to stars A and B? Star A has d=1/p”=1000 parsecs. Star B is 25 times fainter, so must be 5 times farther away (inverse square law), 5000 parsecs. b) Star ...
Gliese 581
Gliese 581 (/ˈɡliːzə/) is a star of spectral type M3V (a red dwarf) about 20 light years away from Earth in the constellation Libra. Its estimated mass is about a third of that of the Sun, and it is the 89th closest known star to the Sun. Observations suggest that the star has a planetary system consisting of three known planets, designated Gliese 581 b, c, and e and a possibly confirmed planet, d, in order of discovery. Additional outer planets, which received the designations Gliese 581 f, and g have been proposed, but the evidence that led to the discovery claims has been shown to be the result of stellar activity mimicking the radial velocity variations due to orbiting planets.Gliese 581 has been the subject of a ""huge amount of attention"" in the quest to discover the first habitable extrasolar planet; first for c, and then d and g. Gliese 581 c, the first low-mass extrasolar planet found near a habitable zone, was discovered in April 2007. It has since been shown that under known terrestrial planet climate models, Gliese 581 c is likely to have a runaway greenhouse effect, and hence is probably too hot to be habitable, analogous to Venus. The proposed planets Gliese 581 d and Gliese 581 g also received attention as being located within the habitable zone, but their existence has subsequently been put into doubt by some authors.On 27 November 2012, the European Space Agency announced a debris disk, with at least ten times as many comets as the Solar System. This put constraints on possible planets beyond 0.75 AU.