The Next Step: Exponential Life 1 — PB
... But, either way, we may one day confront in reality scenarios where autonomous robots “ go rogue,” where a “supercomputer” offers its controller dominance of international finance, or where a network could develop a mind of its own. If it could infiltrate the Internet—and the burgeoning “Internet of ...
... But, either way, we may one day confront in reality scenarios where autonomous robots “ go rogue,” where a “supercomputer” offers its controller dominance of international finance, or where a network could develop a mind of its own. If it could infiltrate the Internet—and the burgeoning “Internet of ...
ph507rev1
... Because the flux of starlight varies with wavelength, the magnitude of a star depends upon the wavelength at which we observe. Originally, photographic plates were sensitive only to blue light, and the term photographic magnitude (mpg) still refers to magnitudes centred around 420 nm (in the blue re ...
... Because the flux of starlight varies with wavelength, the magnitude of a star depends upon the wavelength at which we observe. Originally, photographic plates were sensitive only to blue light, and the term photographic magnitude (mpg) still refers to magnitudes centred around 420 nm (in the blue re ...
Chapter 25 - Taylor County Schools
... The surface of Mars is dry and rocky, and is covered with this reddish dust. The atmosphere is very thin and is composed mainly of carbon dioxide. Mars has about half of the gravity of Earth, so when the wind blows, the dust from the surface rises and gives the atmosphere a reddish pink appearance. ...
... The surface of Mars is dry and rocky, and is covered with this reddish dust. The atmosphere is very thin and is composed mainly of carbon dioxide. Mars has about half of the gravity of Earth, so when the wind blows, the dust from the surface rises and gives the atmosphere a reddish pink appearance. ...
Class Project Physics 1010-042, Physics 1010
... advanced than we are. If they are a lot more advanced than us they could probably travel to us. Why this is a paradox is because if those intelligent life forms are more advanced and can travel through space “where are they?” 2. List and briefly explain (like in a paragraph for each) 4 possible res ...
... advanced than we are. If they are a lot more advanced than us they could probably travel to us. Why this is a paradox is because if those intelligent life forms are more advanced and can travel through space “where are they?” 2. List and briefly explain (like in a paragraph for each) 4 possible res ...
Star Formation 1 - Center for Astrostatistics
... when the inward pull of gravity and outward push of gas pressure are equal everywhere. The result is a sphere, hot & dense in the core, cooler & less dense at the edges. Will this cloud of atoms in equilibrium persist forever without change? No! When atoms bump into each other, the electrons are bum ...
... when the inward pull of gravity and outward push of gas pressure are equal everywhere. The result is a sphere, hot & dense in the core, cooler & less dense at the edges. Will this cloud of atoms in equilibrium persist forever without change? No! When atoms bump into each other, the electrons are bum ...
Fulltext PDF - Indian Academy of Sciences
... this been done with greater devotion than in astronomy where, since ancient times, one has been keeping accurate records of the position of stars in the sky. This was good because in 1718 Edmund Halley noticed that at least three important stars seemed to have changed their traditionally recorded po ...
... this been done with greater devotion than in astronomy where, since ancient times, one has been keeping accurate records of the position of stars in the sky. This was good because in 1718 Edmund Halley noticed that at least three important stars seemed to have changed their traditionally recorded po ...
Time From the Perspective of a Particle Physicist
... • If we use well-understood close stars to determine the overall brightness scale of a specific class of star, then measuring the spectrum can be used to give the distance for stars > 500 LY away 1. Determine Surface Temperature + spectral class of star 2. Determine where on HR diagram should go 3. ...
... • If we use well-understood close stars to determine the overall brightness scale of a specific class of star, then measuring the spectrum can be used to give the distance for stars > 500 LY away 1. Determine Surface Temperature + spectral class of star 2. Determine where on HR diagram should go 3. ...
Trimester 1 Exam –Science 6 S C I E N C E 6 TRIMESTER I EXAM
... C. Comets do not revolve around the Sun. D. Asteroids do not revolve around the Sun. ...
... C. Comets do not revolve around the Sun. D. Asteroids do not revolve around the Sun. ...
Measuring the ligth
... r grows, it will actually grow with the second power of the distance. On the other hand the light will be lost with the second power of the distance. Both effects compensate and the net result is that the intensity doesn’t depend on the distance. Therefore the intensity informs us directly about phy ...
... r grows, it will actually grow with the second power of the distance. On the other hand the light will be lost with the second power of the distance. Both effects compensate and the net result is that the intensity doesn’t depend on the distance. Therefore the intensity informs us directly about phy ...
answers2006_07_BC
... Type Ia supernovae all have very similar brightness, and are bright enough to be seen out to large redshifts, so can be used to check how the expansion of the universe changes with time. ...
... Type Ia supernovae all have very similar brightness, and are bright enough to be seen out to large redshifts, so can be used to check how the expansion of the universe changes with time. ...
Astronomers Find Extremely Large Planet
... young forming stars. The fact that the FLAMINGOS survey only found silhouette disks in clusters and not peppered thoughout the immense volume of the molecular clouds supports the point of view that such clusters of stars are the birthplace for most of the stars in our galaxy. “It’s surprising that t ...
... young forming stars. The fact that the FLAMINGOS survey only found silhouette disks in clusters and not peppered thoughout the immense volume of the molecular clouds supports the point of view that such clusters of stars are the birthplace for most of the stars in our galaxy. “It’s surprising that t ...
PLANETESIMALS TO BROWN DWARFS: What is a Planet?
... (exoplanets). The first exoplanets discovered are actually terrestrial, but were found in orbit around a neutron star (Wolszczan & Frail 1992). These clearly have a very different history from planets in our Solar System because their current orbits would have been inside the supergiant star that pre ...
... (exoplanets). The first exoplanets discovered are actually terrestrial, but were found in orbit around a neutron star (Wolszczan & Frail 1992). These clearly have a very different history from planets in our Solar System because their current orbits would have been inside the supergiant star that pre ...
Astronomy Club of Asheville October 2016 Sky Events
... Zodiacal light is the sunlight reflected from numerous dust grains located along the plane of the solar system the ecliptic or “zodiac”. These dust grains are left over from the formation of the solar system (a type of cosmic dust), and their supply is continuously fed by particles from comets ...
... Zodiacal light is the sunlight reflected from numerous dust grains located along the plane of the solar system the ecliptic or “zodiac”. These dust grains are left over from the formation of the solar system (a type of cosmic dust), and their supply is continuously fed by particles from comets ...
Day 2
... As the helium core contracts, the temperature and pressure increases. This increase in temperature causes the rate of hydrogen fusion in the shell surrounding the core to go up. As a result, the star expands (by as much as 200 times!). The star is now very cool, but luminous – a Red Giant! ...
... As the helium core contracts, the temperature and pressure increases. This increase in temperature causes the rate of hydrogen fusion in the shell surrounding the core to go up. As a result, the star expands (by as much as 200 times!). The star is now very cool, but luminous – a Red Giant! ...
Disk Instability Models
... Heretical Explanation for Microlensing Planets • Most stars form in regions of high-mass star formation (e.g., Orion, Carina) where their protoplanetary disks can be photoevaporated away by nearby O stars. • Photoevaporation converts gas giant protoplanets into ice giants if the protoplanet orbit ...
... Heretical Explanation for Microlensing Planets • Most stars form in regions of high-mass star formation (e.g., Orion, Carina) where their protoplanetary disks can be photoevaporated away by nearby O stars. • Photoevaporation converts gas giant protoplanets into ice giants if the protoplanet orbit ...
Lecture 7 Gravity and satellites
... b. Point Y represents the distance from planet Alpha where the magnitude of the net gravitational force is zero. What is this distance in terms of R? ...
... b. Point Y represents the distance from planet Alpha where the magnitude of the net gravitational force is zero. What is this distance in terms of R? ...
Neptunus
... been the subject of whole books, and will not be covered here at the present time. Suffice it to say that as a result of those calculations, Neptune was discovered on September 23, 1846 by the astronomer Johann Galle and his student Heinrich d'Arrest, after only thirty minutes of searching the sky, ...
... been the subject of whole books, and will not be covered here at the present time. Suffice it to say that as a result of those calculations, Neptune was discovered on September 23, 1846 by the astronomer Johann Galle and his student Heinrich d'Arrest, after only thirty minutes of searching the sky, ...
Lecture 7: Extrasolar Planets 01/08/2013 update: 725 exoplanets
... where MJ is the mass of Jupiter, should have almost the same radii (i.e. a flat mass-radius relation). -> Giant extrasolar planets transiting solar-type stars produce transits with a depth of around 1%. Close-in planets are strongly irradiated, so their radii can be (detectably) larger. But this hea ...
... where MJ is the mass of Jupiter, should have almost the same radii (i.e. a flat mass-radius relation). -> Giant extrasolar planets transiting solar-type stars produce transits with a depth of around 1%. Close-in planets are strongly irradiated, so their radii can be (detectably) larger. But this hea ...
Teaching astrophysics in VCE Physics
... $ From these figures it was calculated that if the Sun was made of coal, it could burn for about 10,000 years - given a lot of oxygen! As life on the Earth seemed to be millions of years old this appeared to be a problem! $ Lord Kelvin and Hermann von Helmholtz suggested that the collapsing matter f ...
... $ From these figures it was calculated that if the Sun was made of coal, it could burn for about 10,000 years - given a lot of oxygen! As life on the Earth seemed to be millions of years old this appeared to be a problem! $ Lord Kelvin and Hermann von Helmholtz suggested that the collapsing matter f ...
Super Giant
... 1. What is the speed of light in miles? 186,000 miles/second 2. Does the speed of light measure distance or time? distance 3. Explain how when we are looking up at the night sky, we are in fact looking back in time? Because of the hugeness of space, it takes millions of years for the light givenoff ...
... 1. What is the speed of light in miles? 186,000 miles/second 2. Does the speed of light measure distance or time? distance 3. Explain how when we are looking up at the night sky, we are in fact looking back in time? Because of the hugeness of space, it takes millions of years for the light givenoff ...
Slide 1
... Assume the two stars A and B have the same absorption line in their spectra. They are so close to one another that we can only see them as one star, and we can only measure their combined spectrum. What will we see in the combined spectrum at the instant ...
... Assume the two stars A and B have the same absorption line in their spectra. They are so close to one another that we can only see them as one star, and we can only measure their combined spectrum. What will we see in the combined spectrum at the instant ...
Measuring Stars
... Since Type Ia Supernovae involve an explosion that occurs around a fixed mass (1.4Mʘ ), they are a very homogeneous events, and have about the same luminosity. So they are like standard candles, wherever they occur, they have the same intrinsic luminosity. If we see a type Ia supernova somewhere (in ...
... Since Type Ia Supernovae involve an explosion that occurs around a fixed mass (1.4Mʘ ), they are a very homogeneous events, and have about the same luminosity. So they are like standard candles, wherever they occur, they have the same intrinsic luminosity. If we see a type Ia supernova somewhere (in ...
Earth in the Universe Grade One
... producing high tides about twice a day along ocean shores. Similar bulges are produced in the blanket of air as well. Of all the diverse planets and moons in our solar system, only the earth appears to be capable of supporting life as we know it. The gravitational pull of the planet's mass is suffic ...
... producing high tides about twice a day along ocean shores. Similar bulges are produced in the blanket of air as well. Of all the diverse planets and moons in our solar system, only the earth appears to be capable of supporting life as we know it. The gravitational pull of the planet's mass is suffic ...
Document
... allows us to build up a picture of things that we cannot see (such as the core of a star). If the observations agree with the results predicted by the numerical model, we can conclude that the model is good, or at least that it is giving us some true information about the object. Although, sometimes ...
... allows us to build up a picture of things that we cannot see (such as the core of a star). If the observations agree with the results predicted by the numerical model, we can conclude that the model is good, or at least that it is giving us some true information about the object. Although, sometimes ...
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.