Question 1
... The habitable zone is the area where a) temperatures on a planet are reasonable. b) terrestrial planets can form around a star. c) terrestrial planets could have liquid water on their surfaces. d) liquid water can condense into rain in the atmosphere. e) Sun-like stars can exist in the Milky Way Gal ...
... The habitable zone is the area where a) temperatures on a planet are reasonable. b) terrestrial planets can form around a star. c) terrestrial planets could have liquid water on their surfaces. d) liquid water can condense into rain in the atmosphere. e) Sun-like stars can exist in the Milky Way Gal ...
Midterm - Department of Physics and Astronomy
... The small asteroid Lisana has a roughly circular orbit with a semi-major axis of 0.650 AU and revolves about the sun in the same direction as the planets. (You should assume for this problem that the earth’s orbit is circular as well and that the two orbits are coplanar.) On December 31 at midnight ...
... The small asteroid Lisana has a roughly circular orbit with a semi-major axis of 0.650 AU and revolves about the sun in the same direction as the planets. (You should assume for this problem that the earth’s orbit is circular as well and that the two orbits are coplanar.) On December 31 at midnight ...
Chapter 1 Starts and Galaxies
... Giant star- star with a diameter about 10 to 100 times as large as the sun Supergiant star- star with a diameter up to 1000 times the diameter of the sun; largest of all stars White dwarf- small dense star Neutron star- smallest of all stars ...
... Giant star- star with a diameter about 10 to 100 times as large as the sun Supergiant star- star with a diameter up to 1000 times the diameter of the sun; largest of all stars White dwarf- small dense star Neutron star- smallest of all stars ...
b 03 Other Obj in Sol System combo ppt
... Asteroids Asteroids – made up of stoney/rocky and “metallic” materials (eg. iron) • rich in minerals (like planetary moons) • largest asteroid is only about 100 km in diameter • about 91 Apollo asteroids have been identified – potential for colliding with Earth (theory for extinction of the dinosau ...
... Asteroids Asteroids – made up of stoney/rocky and “metallic” materials (eg. iron) • rich in minerals (like planetary moons) • largest asteroid is only about 100 km in diameter • about 91 Apollo asteroids have been identified – potential for colliding with Earth (theory for extinction of the dinosau ...
summary - guideposts
... The terrestrial planets may have formed slowly from the accretion of planetesimals of similar composition. Dense cores and low density crusts could have formed later by differentiation when radioactive decay heated the planet’s interiors. It is also possible that the planets formed so rapidly that t ...
... The terrestrial planets may have formed slowly from the accretion of planetesimals of similar composition. Dense cores and low density crusts could have formed later by differentiation when radioactive decay heated the planet’s interiors. It is also possible that the planets formed so rapidly that t ...
Orbital Motion
... A weather satellite completes a circular orbit every 3.5 hours. How far above the Earth’s surface is it? 2) A double star consists of two identical stars, each with a mass of 3.0 x 1030 kg. They are separated by 2.0 x 1011 m between their centres. How long do they take to complete one orbit? (p. 301 ...
... A weather satellite completes a circular orbit every 3.5 hours. How far above the Earth’s surface is it? 2) A double star consists of two identical stars, each with a mass of 3.0 x 1030 kg. They are separated by 2.0 x 1011 m between their centres. How long do they take to complete one orbit? (p. 301 ...
Slide 1
... constant like in a circular orbit. It is depends on its distance from the Sun. – It is slower when it is further away for the Sun – It is faster when it is closer to the Sun. ...
... constant like in a circular orbit. It is depends on its distance from the Sun. – It is slower when it is further away for the Sun – It is faster when it is closer to the Sun. ...
The Lives of Stars
... The larger star has more mass, so more luminosity, and burns much more quickly. Hydrogen is depleted in less than 108 years (100 Million years) The star becomes a pulsa>ng ...
... The larger star has more mass, so more luminosity, and burns much more quickly. Hydrogen is depleted in less than 108 years (100 Million years) The star becomes a pulsa>ng ...
4550-15Lecture35
... Collapse of a part of a nebula can occur through the removal of a supporting force, magnetic fields in particular, or by an increase in an external force, such as a passing shock wave, such as from a supernova or galactic arm. As the cloud collapses, it will warm adiabatically, resulting in thermal ...
... Collapse of a part of a nebula can occur through the removal of a supporting force, magnetic fields in particular, or by an increase in an external force, such as a passing shock wave, such as from a supernova or galactic arm. As the cloud collapses, it will warm adiabatically, resulting in thermal ...
Center for Origins Studies: CalSpace
... Erastothenes (276-194 BC): If the Sun is much farther away, its rays arrives on parallel lines. Anaxagoras’s problem is then given by the bottom diagram. Alexandria lies north of Syene by a latitude angle arctan(1/8) = 7.2o = 360o/50. Distance from Alexandria to Syene, 800 km, is 1/50 of the polar c ...
... Erastothenes (276-194 BC): If the Sun is much farther away, its rays arrives on parallel lines. Anaxagoras’s problem is then given by the bottom diagram. Alexandria lies north of Syene by a latitude angle arctan(1/8) = 7.2o = 360o/50. Distance from Alexandria to Syene, 800 km, is 1/50 of the polar c ...
MCSD Grade 4 Science Quarterly Assessment
... b. date, time, air temperature, number of frogs c. date, time, water temperature, number of frogs d. date, air temperature, wind speed, number of frogs ...
... b. date, time, air temperature, number of frogs c. date, time, water temperature, number of frogs d. date, air temperature, wind speed, number of frogs ...
lecture3
... There are many more stars in the sky than can be seen with the naked eye. If this is so, how can we hold the opinion, as in the Middle Ages, that the . heavens are provided for the sole benefit of mankind? ...
... There are many more stars in the sky than can be seen with the naked eye. If this is so, how can we hold the opinion, as in the Middle Ages, that the . heavens are provided for the sole benefit of mankind? ...
Quiz # 1 - Oglethorpe University
... c. the Sun moved among the planets, and pulled them out of their circular orbits d. the planets moved on a small circle whose center in turn circled a point near the Earth e. you can't fool me, Ptolemy's system did not include ANY explanation of retrograde motion We now know that the orbit of a stab ...
... c. the Sun moved among the planets, and pulled them out of their circular orbits d. the planets moved on a small circle whose center in turn circled a point near the Earth e. you can't fool me, Ptolemy's system did not include ANY explanation of retrograde motion We now know that the orbit of a stab ...
Are there Earth-like planets around other stars?
... Solar System shortly after Earth was formed. If they had still been around today, regular collisions with them would most likely have removed our atmosphere and evaporated the oceans, preventing life from gaining ...
... Solar System shortly after Earth was formed. If they had still been around today, regular collisions with them would most likely have removed our atmosphere and evaporated the oceans, preventing life from gaining ...
Chapter 22 Touring our Solar System Solar System * Inventory • 1
... due to intense heat – Very few visible craters Internal Structure ...
... due to intense heat – Very few visible craters Internal Structure ...
24-2 Characteristics of Stars
... Brightness of Stars • Brightness = amount of light given off • Depends upon size and temperature • How bright a star looks from earth depends upon how far away it is and how bright it is ...
... Brightness of Stars • Brightness = amount of light given off • Depends upon size and temperature • How bright a star looks from earth depends upon how far away it is and how bright it is ...
The Origin of Our Solar System
... heavy elements into the interstellar medium • New stars form from the enriched interstellar medium, and have the similar abundance as the interstellar medium. • Solar system contains “recycled” heavy elements from stars that died long ago. ...
... heavy elements into the interstellar medium • New stars form from the enriched interstellar medium, and have the similar abundance as the interstellar medium. • Solar system contains “recycled” heavy elements from stars that died long ago. ...
Objective or GLE: 6.1.A.a: Classify celestial bodies in the solar
... Objective or GLE: 6.1.A.a: Classify celestial bodies in the solar system into categories: Sun, moon, planets, and other small bodies (i.e., asteroids, comets, meteors), based on physical properties. Question: Classify celestial bodies in the solar system into categories based on size (physical prope ...
... Objective or GLE: 6.1.A.a: Classify celestial bodies in the solar system into categories: Sun, moon, planets, and other small bodies (i.e., asteroids, comets, meteors), based on physical properties. Question: Classify celestial bodies in the solar system into categories based on size (physical prope ...
Lecture 2 - U of L Class Index
... the final nail in the coffin of the geocentric model. Geocentric ...
... the final nail in the coffin of the geocentric model. Geocentric ...
4. How can we select stars whose planets are likely homes for life?
... Travel between stars is nearly impossible because the distances are too great and nature has imposed a very real speed limit that we can not exceed. Nothing can travel faster than the speed of light, and human travel can not be expected to exceed even a small fraction of the speed of light. Therefor ...
... Travel between stars is nearly impossible because the distances are too great and nature has imposed a very real speed limit that we can not exceed. Nothing can travel faster than the speed of light, and human travel can not be expected to exceed even a small fraction of the speed of light. Therefor ...
Our Solar System
... •A star with a planet will move in its own small orbit in response to the planet's gravity. The goal now is to measure variations in the speed with which the star moves toward or away from Earth. •In other words, the variations are in the radial velocity of the star with respect to Earth. The radial ...
... •A star with a planet will move in its own small orbit in response to the planet's gravity. The goal now is to measure variations in the speed with which the star moves toward or away from Earth. •In other words, the variations are in the radial velocity of the star with respect to Earth. The radial ...
Grade 9 Science – Unit 4 Space Quiz
... 33. Draw AND label (1) a Solar Eclipse and (2) a Lunar Eclipse 34. What is the difference between Apparent Magnitude and Absolute Magnitude? 35. How does the Earth remain in its orbit around the Earth? In other words, why does the Sun’s gravity not pull the Earth into the Sun? Provide TWO reasons. 3 ...
... 33. Draw AND label (1) a Solar Eclipse and (2) a Lunar Eclipse 34. What is the difference between Apparent Magnitude and Absolute Magnitude? 35. How does the Earth remain in its orbit around the Earth? In other words, why does the Sun’s gravity not pull the Earth into the Sun? Provide TWO reasons. 3 ...
Geocentric vs. Heliocentric Models of the Solar System
... between the Earth and Sun to that between the Earth and the Moon. (His estimate was more than an order of magnitude too small, but the fault was in his lack of accurate instruments rather than in his method of reasoning.) -This image compares the line subtending the arc dividing the light and dark p ...
... between the Earth and Sun to that between the Earth and the Moon. (His estimate was more than an order of magnitude too small, but the fault was in his lack of accurate instruments rather than in his method of reasoning.) -This image compares the line subtending the arc dividing the light and dark p ...
3536
... times or a super-Earth planet). For an Earth-like planet, Proxima b’s slow rotation rate should not have a significant impact on magnetic field generation, as this is mostly influenced by the internal heat flux that controls the mantle convection rather than a dynamo [2,3] (Christensen & Aubert 2006 ...
... times or a super-Earth planet). For an Earth-like planet, Proxima b’s slow rotation rate should not have a significant impact on magnetic field generation, as this is mostly influenced by the internal heat flux that controls the mantle convection rather than a dynamo [2,3] (Christensen & Aubert 2006 ...
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.