History of Astronomy
... Limited to naked-eye observations, their idea of using logic and mathematics as tools for investigating nature is still with us today Their investigative methodology is in many ways as important as the discoveries ...
... Limited to naked-eye observations, their idea of using logic and mathematics as tools for investigating nature is still with us today Their investigative methodology is in many ways as important as the discoveries ...
S T A R S
... the brighter planets like Jupiter, Venus, Mars and Saturn but is a bit hard for the fainter planets. The planets give off a more steady light and the stars give off a twinkling light. That is because the light from the stars travel a far greater distance and will be distorted and bent a little som ...
... the brighter planets like Jupiter, Venus, Mars and Saturn but is a bit hard for the fainter planets. The planets give off a more steady light and the stars give off a twinkling light. That is because the light from the stars travel a far greater distance and will be distorted and bent a little som ...
Mass extinctions and supernova explosions
... highly intensive gamma ray bursts (GRBs), which could be connected to SNe, initiated further discussions on possible life-threatening events in Earth’s history. The probability that GRBs hit the Earth is very low. Nevertheless, a past interaction of Earth with GRBs and/or SNe cannot be excluded and ...
... highly intensive gamma ray bursts (GRBs), which could be connected to SNe, initiated further discussions on possible life-threatening events in Earth’s history. The probability that GRBs hit the Earth is very low. Nevertheless, a past interaction of Earth with GRBs and/or SNe cannot be excluded and ...
Larger, high-res file, best for printing
... faint as to escape any real notice. Is it possible Cas A’s supernovae was unusually dim? Model calculations indicate that a delayed explosion after core collapse can result in gravitationally bound ejecta — within minutes of the explosion, much of the ejecta falls back onto the core. Since supernova ...
... faint as to escape any real notice. Is it possible Cas A’s supernovae was unusually dim? Model calculations indicate that a delayed explosion after core collapse can result in gravitationally bound ejecta — within minutes of the explosion, much of the ejecta falls back onto the core. Since supernova ...
Physical Setting/Earth Science
... (1) Earth’s rotation rate is 15°/hour and its revolution rate is 1°/day. (2) Earth’s rotation rate is 1°/hour and its revolution rate is 15°/day. (3) Earth’s rotation rate is 24°/hour and its revolution rate is 360°/day. (4) Earth’s rotation rate is 360°/hour and its revolution rate is 24°/day. ...
... (1) Earth’s rotation rate is 15°/hour and its revolution rate is 1°/day. (2) Earth’s rotation rate is 1°/hour and its revolution rate is 15°/day. (3) Earth’s rotation rate is 24°/hour and its revolution rate is 360°/day. (4) Earth’s rotation rate is 360°/hour and its revolution rate is 24°/day. ...
The Night Sky
... The all-sky constellation chart in the center of the November Sky & Telescope will do just fine. ...
... The all-sky constellation chart in the center of the November Sky & Telescope will do just fine. ...
ESA Science Program: Status of ILWS Related Activities
... Future Missions - Solar Orbiter • Selected as ESA Flexi-mission and confirmed as part of ”COSMIC VISION” • Formal negotiations about a potential NASA contribution ( or collaboration with Solar Sentinels ) in progress… ...
... Future Missions - Solar Orbiter • Selected as ESA Flexi-mission and confirmed as part of ”COSMIC VISION” • Formal negotiations about a potential NASA contribution ( or collaboration with Solar Sentinels ) in progress… ...
The evolution of organic matter in space
... Carbon, and molecules made from it, have already been observed in the early Universe. During cosmic time, many galaxies undergo intense periods of star formation, during which heavy elements like carbon, oxygen, nitrogen, silicon and iron are produced. Also, many complex molecules, from carbon monox ...
... Carbon, and molecules made from it, have already been observed in the early Universe. During cosmic time, many galaxies undergo intense periods of star formation, during which heavy elements like carbon, oxygen, nitrogen, silicon and iron are produced. Also, many complex molecules, from carbon monox ...
Compilation of a Glossary of International Terms Related to
... various dimensions and origins (e.g., steep or shallow slopes, long or short lengths). These two examples illustrate that some commonly used terms can imply an origin (craters are most often assumed to be of impact origin), whereas other terms are specifically intended not to imply an origin (e.g., ...
... various dimensions and origins (e.g., steep or shallow slopes, long or short lengths). These two examples illustrate that some commonly used terms can imply an origin (craters are most often assumed to be of impact origin), whereas other terms are specifically intended not to imply an origin (e.g., ...
Historical astronomy How Johannes Kepler Johannes
... he was 5. Kepler’s mother took him to a hilltop to view the Great Comet of 1577, whose tail arched across the entire sky. Kepler’s first job was as a math teacher in Graz, Austria. It was there that he embarked on his lifelong quest for harmony. In a flight of mathematical mysticism, he tried to lin ...
... he was 5. Kepler’s mother took him to a hilltop to view the Great Comet of 1577, whose tail arched across the entire sky. Kepler’s first job was as a math teacher in Graz, Austria. It was there that he embarked on his lifelong quest for harmony. In a flight of mathematical mysticism, he tried to lin ...
pierrehumbert_lecture_1
... • Very shortwave ultraviolet (EUV) and X-rays are absorbed high up in the atmosphere, and heat it to the point where the atmosphere can escape to space. • i.e. it’s the rocket fuel that brings molecules up to escape velocity and can launch atmosphere out of the gravity well. • Shorter wave ultraviol ...
... • Very shortwave ultraviolet (EUV) and X-rays are absorbed high up in the atmosphere, and heat it to the point where the atmosphere can escape to space. • i.e. it’s the rocket fuel that brings molecules up to escape velocity and can launch atmosphere out of the gravity well. • Shorter wave ultraviol ...
Living with a Red Dwarf - Center for Space and Habitability (CSH)
... • Very shortwave ultraviolet (EUV) and X-rays are absorbed high up in the atmosphere, and heat it to the point where the atmosphere can escape to space. • i.e. it’s the rocket fuel that brings molecules up to escape velocity and can launch atmosphere out of the gravity well. • Shorter wave ultraviol ...
... • Very shortwave ultraviolet (EUV) and X-rays are absorbed high up in the atmosphere, and heat it to the point where the atmosphere can escape to space. • i.e. it’s the rocket fuel that brings molecules up to escape velocity and can launch atmosphere out of the gravity well. • Shorter wave ultraviol ...
Chapter 2
... good approximation to the orbits of the Sun and the Moon, but it could not account for the observed variations in planetary brightness or the retrograde motion of the planets. A more complex model was needed to describe these heavenly “wanderers.” In the first step toward this new model, each planet ...
... good approximation to the orbits of the Sun and the Moon, but it could not account for the observed variations in planetary brightness or the retrograde motion of the planets. A more complex model was needed to describe these heavenly “wanderers.” In the first step toward this new model, each planet ...
Astonomy-Space The Final Frontier
... Constructing Explanation and Designed Solutions Constructing explanations and designing solutions in 9 – 12 builds on K – 8 experiences and progresses to explanations and designs that are supported by multiple and independent student-generated sources of evidence consistent with scientific ideas, pr ...
... Constructing Explanation and Designed Solutions Constructing explanations and designing solutions in 9 – 12 builds on K – 8 experiences and progresses to explanations and designs that are supported by multiple and independent student-generated sources of evidence consistent with scientific ideas, pr ...
A radiogenic heating evolution model for cosmochemically Earth
... 2. Galactic chemical evolution Astrophysicists have long been faced with the challenge of trying to encapsulate the chemical evolution of the Galaxy into a single cohesive narrative (Burbidge et al., 1957). To tackle this problem, GCE models were formulated to address how the bulk chemistry of the G ...
... 2. Galactic chemical evolution Astrophysicists have long been faced with the challenge of trying to encapsulate the chemical evolution of the Galaxy into a single cohesive narrative (Burbidge et al., 1957). To tackle this problem, GCE models were formulated to address how the bulk chemistry of the G ...
Olbers` Paradox - NMSU Astronomy
... the line of sight argument: In an infinite, homogeneous Universe every line of sight will end upon the surface of a Star. So why is the sky dark at night? The advantage offered by this argument is that it doesn’t require the stars to be randomly scattered in space, but also works if the stars are g ...
... the line of sight argument: In an infinite, homogeneous Universe every line of sight will end upon the surface of a Star. So why is the sky dark at night? The advantage offered by this argument is that it doesn’t require the stars to be randomly scattered in space, but also works if the stars are g ...
Answering the Fermi Paradox - Acceleration Studies Foundation
... likely to be alone in the galaxy. Fortunately, there is an increasing minority of "developmentalist" (convergent evolution) scholars, such as Simon Conway Morris (Life's Solution, 2004), who argue that in addition to evolution, convergent evolutionary developmental processes must also operate on mac ...
... likely to be alone in the galaxy. Fortunately, there is an increasing minority of "developmentalist" (convergent evolution) scholars, such as Simon Conway Morris (Life's Solution, 2004), who argue that in addition to evolution, convergent evolutionary developmental processes must also operate on mac ...
Celestia DATA WORKSHEET
... 9. OK, let’s take a spaceflight. Zoom in on the sun with the “Home” key until it fills the screen. Look in the upper left corner. It’s apparent magnitude (in parentheses), should be between – 36 and -37. Now, to get our spaceship moving, press the “A” key on the keyboard. Notice that our speed, disp ...
... 9. OK, let’s take a spaceflight. Zoom in on the sun with the “Home” key until it fills the screen. Look in the upper left corner. It’s apparent magnitude (in parentheses), should be between – 36 and -37. Now, to get our spaceship moving, press the “A” key on the keyboard. Notice that our speed, disp ...
Adrian`s December 2016 Night Sky
... On the 17th/18th Comet C/2015V2 Johnson is in a straight line with the two end stars of The Plough. From the end star of The Plough follow along this line towards the bright star Arcturus for 6 degrees (almost the same distance between the end two stars of The Plough) and you will find its locatio ...
... On the 17th/18th Comet C/2015V2 Johnson is in a straight line with the two end stars of The Plough. From the end star of The Plough follow along this line towards the bright star Arcturus for 6 degrees (almost the same distance between the end two stars of The Plough) and you will find its locatio ...
6 The gravitational mechanics of the Earth
... the orientation of the rotation axes of planets and satellites in the solar system: this plane is called the ecliptic. Most solar system bodies do not move far out of this plane. The Earth's instantaneous rotation or spin is about an axis that is inclined to the ecliptic by about 66j', an algle that ...
... the orientation of the rotation axes of planets and satellites in the solar system: this plane is called the ecliptic. Most solar system bodies do not move far out of this plane. The Earth's instantaneous rotation or spin is about an axis that is inclined to the ecliptic by about 66j', an algle that ...
There He Goes Again - GeocentrismDebunked.org
... When I used the annual Doppler shift of celestial bodies to query whether it is reasonable to believe that the Earth is static with the measured annual in-phase Doppler shift arising from an elliptical motion of the cosmos stretching back billions of years, Sungenis responded with an absurd claim th ...
... When I used the annual Doppler shift of celestial bodies to query whether it is reasonable to believe that the Earth is static with the measured annual in-phase Doppler shift arising from an elliptical motion of the cosmos stretching back billions of years, Sungenis responded with an absurd claim th ...
L3-January 15/08
... The planet is behind (superior conjunction) or in front of (inferior conjunction) the Sun Opposition – planet’s elongation is 180o planet is in the opposite part of the sky from the Sun Quadrature – elongation (superior planet only!) is 90o largest elongation of an inferior planet is the ...
... The planet is behind (superior conjunction) or in front of (inferior conjunction) the Sun Opposition – planet’s elongation is 180o planet is in the opposite part of the sky from the Sun Quadrature – elongation (superior planet only!) is 90o largest elongation of an inferior planet is the ...
ASTR 330: The Solar System
... compounds representative of solid grains that probably formed in a cooling gas cloud of cosmic (solar) abundance at temperatures of a few hundred Kelvins. Some of these grains even predate the formation of the solar system. • (In other words) We have evidence that certain microscopic grains in some ...
... compounds representative of solid grains that probably formed in a cooling gas cloud of cosmic (solar) abundance at temperatures of a few hundred Kelvins. Some of these grains even predate the formation of the solar system. • (In other words) We have evidence that certain microscopic grains in some ...
Astrobiology
Astrobiology is the study of the origin, evolution, distribution, and future of life in the universe: extraterrestrial life and life on Earth. This interdisciplinary field encompasses the search for habitable environments in our Solar System and habitable planets outside our Solar System, the search for evidence of prebiotic chemistry, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in outer space. Astrobiology addresses the question of whether life exists beyond Earth, and how humans can detect it if it does. (The term exobiology is similar but more specific—it covers the search for life beyond Earth, and the effects of extraterrestrial environments on living things.)Astrobiology makes use of physics, chemistry, astronomy, biology, molecular biology, ecology, planetary science, geography, and geology to investigate the possibility of life on other worlds and help recognize biospheres that might be different from the biosphere on Earth. The origin and early evolution of life is an inseparable part of the discipline of astrobiology. Astrobiology concerns itself with interpretation of existing scientific data; given more detailed and reliable data from other parts of the universe, the roots of astrobiology itself—physics, chemistry and biology—may have their theoretical bases challenged. Although speculation is entertained to give context, astrobiology concerns itself primarily with hypotheses that fit firmly into existing scientific theories.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. According to research published in August 2015, very large galaxies may be more favorable to the creation and development of habitable planets than smaller galaxies, like the Milky Way galaxy. 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.Current studies on the planet Mars by the Curiosity and Opportunity rovers are now searching for evidence of ancient life as well as plains related to ancient rivers or lakes that may have been habitable. The search for evidence of habitability, taphonomy (related to fossils), and organic molecules on the planet Mars is now a primary NASA objective on Mars.