What makes a planet habitable?
... heating due to O2 and O3 photodissociation by solar UV radiation (1250 ≤ λ ≤ 3500 Å), ...
... heating due to O2 and O3 photodissociation by solar UV radiation (1250 ≤ λ ≤ 3500 Å), ...
document
... The second advance, the theory of natural selection, suggested an answer. According to this proposal, set forth by Charles Darwin and Alfred Russel Wallace, some of the differences between individuals in a population are heritable. When the environment changes, individuals bearing traits that provid ...
... The second advance, the theory of natural selection, suggested an answer. According to this proposal, set forth by Charles Darwin and Alfred Russel Wallace, some of the differences between individuals in a population are heritable. When the environment changes, individuals bearing traits that provid ...
ASTR 330: The Solar System
... than 4.6 billion years, even though the Galaxy that contains the solar system is much older than this. Furthermore, many meteorites share this common age, which we have called “the age of the solar system”. • Around 100 years ago, a very different theory for the formation of the planets was in favor ...
... than 4.6 billion years, even though the Galaxy that contains the solar system is much older than this. Furthermore, many meteorites share this common age, which we have called “the age of the solar system”. • Around 100 years ago, a very different theory for the formation of the planets was in favor ...
GCR Neon Isotopic Abundances: Comparison with Wolf
... relative to 20Ne compared to low energy matter (i.e., gas). We note that it is not presently known to what extent the ACRs actually represent the general ISM. It should also be noted that the solar system may not have formed in the local ISM. It has been suggested that the Sun may have formed ~2 kp ...
... relative to 20Ne compared to low energy matter (i.e., gas). We note that it is not presently known to what extent the ACRs actually represent the general ISM. It should also be noted that the solar system may not have formed in the local ISM. It has been suggested that the Sun may have formed ~2 kp ...
3. Chapter 12
... background “noise,” or signal interference. They thought there were problems with the antenna and other equipment they were using and made several adjustments. However, no matter what they did or where they pointed the antenna in the sky, they continued to pick up interference. They finally conclude ...
... background “noise,” or signal interference. They thought there were problems with the antenna and other equipment they were using and made several adjustments. However, no matter what they did or where they pointed the antenna in the sky, they continued to pick up interference. They finally conclude ...
Word doc - GDN - University of Gloucestershire
... if the Universe began with a hot Big Bang, then the Universe should be filled with electromagnetic radiation cooled from the early fireball to a temperature of around 10 degrees above absolute zero (~10°K). In subsequent years a large number of measurements of the Cosmic Microwave Background at diff ...
... if the Universe began with a hot Big Bang, then the Universe should be filled with electromagnetic radiation cooled from the early fireball to a temperature of around 10 degrees above absolute zero (~10°K). In subsequent years a large number of measurements of the Cosmic Microwave Background at diff ...
Solar System Deuterium/Hydrogen Ratio
... emphasize that the molecular isotopic abundance in H2O and H2 is twice the elemental D/H ratio. Equation (1) does not imply that the thermodynamical equilibrium is reached between the reactants. The notation f(H2–H2O) indicates that the isotopic exchange takes place between H2O and H2 (this notation ...
... emphasize that the molecular isotopic abundance in H2O and H2 is twice the elemental D/H ratio. Equation (1) does not imply that the thermodynamical equilibrium is reached between the reactants. The notation f(H2–H2O) indicates that the isotopic exchange takes place between H2O and H2 (this notation ...
1 HABITABLE ZONES IN THE UNIVERSE GUILLERMO GONZALEZ
... Since its introduction over four decades ago, the Circumstellar Habitable Zone (CHZ) concept has served to focus scientific discussions about habitability within planetary systems. Early studies simply defined the CHZ as that range of distances from the Sun that an Earth-like planet can maintain liq ...
... Since its introduction over four decades ago, the Circumstellar Habitable Zone (CHZ) concept has served to focus scientific discussions about habitability within planetary systems. Early studies simply defined the CHZ as that range of distances from the Sun that an Earth-like planet can maintain liq ...
On the probability of habitable planets.
... ingredients, addressing this question requires enormous scientific extrapolations and some trust in purely theoretical studies. Obviously, the answer depends on the kind of life that we want to consider. Life as we know it always uses carbon-based molecules with liquid water as a solvent, with no ex ...
... ingredients, addressing this question requires enormous scientific extrapolations and some trust in purely theoretical studies. Obviously, the answer depends on the kind of life that we want to consider. Life as we know it always uses carbon-based molecules with liquid water as a solvent, with no ex ...
Origins: Where Are the Aliens?
... CLASSROOM ACTIVITY (CONT.) 3 To begin the activity, tell students they have been hired by NASA to determine whether a mystery planet has the potential for life. In order to do this, students will need to learn how scientists would like to use planetary spectra to determine whether other worlds may ...
... CLASSROOM ACTIVITY (CONT.) 3 To begin the activity, tell students they have been hired by NASA to determine whether a mystery planet has the potential for life. In order to do this, students will need to learn how scientists would like to use planetary spectra to determine whether other worlds may ...
Halley`s Comet is arguably the most famous comet. It is a "periodic
... The comet is named after English astronomer Edmond Halley, who examined reports of a comet approaching Earth in 1531, 1607 and 1682. He concluded that these three comets were actually the same comet returning over and over again, and predicted the comet would come again in 1758. Halley didn't live t ...
... The comet is named after English astronomer Edmond Halley, who examined reports of a comet approaching Earth in 1531, 1607 and 1682. He concluded that these three comets were actually the same comet returning over and over again, and predicted the comet would come again in 1758. Halley didn't live t ...
Chapter 9 Lecture 1
... Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other regions of the inner solar system accreted into • Most meteorites are pieces of asteroids. Primitive meteorites one of the planets. are essentially unchang ...
... Those that were not ejected from this region make up the • How are meteorites related to asteroid belt today. Most asteroids? asteroids in other regions of the inner solar system accreted into • Most meteorites are pieces of asteroids. Primitive meteorites one of the planets. are essentially unchang ...
educator guide - In Saturn`s Rings
... vary, but generally larger rocks make larger craters.] Also, if measured, how does meteoroid size affect crater depth and length of rays? 2. Discuss the difference between meteoroids [rocks in space], meteors [meteoroids glowing from atmospheric friction as they fall toward a moon or planet with an ...
... vary, but generally larger rocks make larger craters.] Also, if measured, how does meteoroid size affect crater depth and length of rays? 2. Discuss the difference between meteoroids [rocks in space], meteors [meteoroids glowing from atmospheric friction as they fall toward a moon or planet with an ...
Opportunity Approaching Mountain Climbing Goal and Signs of
... brightest stars of summer, Vega and Arcturus, are high overhead toward the east and southwest, respectively. Far below Arcturus are the planet Saturn and, to its lower right, Spica. Nearly that high in the southeast is the orange-red supergiant Antares, amid fainter stars of upper Scorpius. Friday, ...
... brightest stars of summer, Vega and Arcturus, are high overhead toward the east and southwest, respectively. Far below Arcturus are the planet Saturn and, to its lower right, Spica. Nearly that high in the southeast is the orange-red supergiant Antares, amid fainter stars of upper Scorpius. Friday, ...
Detection Technique for Artificially-Illuminated Objects in the Outer
... implies that the ratio of artificial illumination, with an unknown spectrum, to scattered sunlight could be a strong function of wavelength. More than ∼ 103 small bodies have already been discovered in the distance range of 30–50 AU, known as the Kuiper belt of the Solar System (Petit et al., 2011). ...
... implies that the ratio of artificial illumination, with an unknown spectrum, to scattered sunlight could be a strong function of wavelength. More than ∼ 103 small bodies have already been discovered in the distance range of 30–50 AU, known as the Kuiper belt of the Solar System (Petit et al., 2011). ...
Here - ScienceA2Z.com
... gravitational contraction. At this point the Sun became a full-fledged star. From the remaining cloud of gas and dust (the "solar nebula"), the various planets formed. They are believed to have formed by accretion: the planets began as dust grains in orbit around the central protostar; then gathered ...
... gravitational contraction. At this point the Sun became a full-fledged star. From the remaining cloud of gas and dust (the "solar nebula"), the various planets formed. They are believed to have formed by accretion: the planets began as dust grains in orbit around the central protostar; then gathered ...
ADVISER I S APPROVAL ____ -4::..2.-.!~....:.::..::::...::::...:::.~.::_...!...., .
... protons which are nuclei of hydrogen, nuclei of helium or alpha particles and nuclei of heavier atoms ranging up to the iron group. These travel at various speeds, some approaching the speed of light. When the rays attain or surpass a certain kinetic energy level they ...
... protons which are nuclei of hydrogen, nuclei of helium or alpha particles and nuclei of heavier atoms ranging up to the iron group. These travel at various speeds, some approaching the speed of light. When the rays attain or surpass a certain kinetic energy level they ...
Fulltext
... cloud around the newly formed planets. Some moons can be captured bodies that were created somewhere else in the system. After that, the newly created planetary system evolves gravitationally, resulting in a complicated pattern of orbital changes of planets, which results in a set of orbits that are ...
... cloud around the newly formed planets. Some moons can be captured bodies that were created somewhere else in the system. After that, the newly created planetary system evolves gravitationally, resulting in a complicated pattern of orbital changes of planets, which results in a set of orbits that are ...
TYPES OF RADIATION IN SPACE
... Radiation is defined as energy in transit in the form of high-speed particles or electromagnetic waves. Radiation may be classified as: 1. Ionizing radiation - is the type of radiation that has sufficient energy to create charged particles (ions) from atoms by removing electrons. Ionizing radiation ...
... Radiation is defined as energy in transit in the form of high-speed particles or electromagnetic waves. Radiation may be classified as: 1. Ionizing radiation - is the type of radiation that has sufficient energy to create charged particles (ions) from atoms by removing electrons. Ionizing radiation ...
Proposal submitted to ISSI
... considered without a more general characterization of the observed planets. It is thus necessary to study the potential signatures of life in the context of the expected diversity of planets and the evolution or modification of their atmospheres due to the interaction with energetic particles (cosmi ...
... considered without a more general characterization of the observed planets. It is thus necessary to study the potential signatures of life in the context of the expected diversity of planets and the evolution or modification of their atmospheres due to the interaction with energetic particles (cosmi ...
Chapter 16 - Follow “Ironmtn.wordpress.com”
... 12.Scientists study meteorites a. because they contain the material from which the solar system was made. b. to find out more about how and when the Earth was created. c. to find out more about other parts of the solar system. d. for all the above reasons. e. Scientists cannot study meteorites becau ...
... 12.Scientists study meteorites a. because they contain the material from which the solar system was made. b. to find out more about how and when the Earth was created. c. to find out more about other parts of the solar system. d. for all the above reasons. e. Scientists cannot study meteorites becau ...
PowerPoint
... a) Clouds fragment into smaller objects, forming many stars at one time. b) One star forms; other matter goes into planets, moons, asteroids, & comets. c) Clouds rotate & throw off mass until only enough is left to form one star. ...
... a) Clouds fragment into smaller objects, forming many stars at one time. b) One star forms; other matter goes into planets, moons, asteroids, & comets. c) Clouds rotate & throw off mass until only enough is left to form one star. ...
Interstellar Space Not as Empty as you Might Think
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. ...
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. ...
Interstellar Space
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
Interstellar Space Not as Empty as you Might Think
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
... Part II: Diffuse interstellar gas (not seen with naked eye) Nebulae make up a tiny fraction of the volume of interstellar space. Diffuse gas exists between the nebulae, but you need a spectrograph to see it… ...
Panspermia
Panspermia (from Greek πᾶν (pan), meaning ""all"", and σπέρμα (sperma), meaning ""seed"") is the hypothesis that life exists throughout the Universe, distributed by meteoroids, asteroids, comets, planetoids and, also, by spacecraft in the form of unintended contamination by microorganisms.Panspermia is a hypothesis proposing that microscopic life forms that can survive the effects of space, such as extremophiles, become trapped in debris that is ejected into space after collisions between planets and small Solar System bodies that harbor life. Some organisms may travel dormant for an extended amount of time before colliding randomly with other planets or intermingling with protoplanetary disks. If met with ideal conditions on a new planet's surfaces, the organisms become active and the process of evolution begins. Panspermia is not meant to address how life began, just the method that may cause its distribution in the Universe.Pseudo-panspermia (sometimes called ""soft panspermia"" or ""molecular panspermia"") argues that the pre-biotic organic building blocks of life originated in space and were incorporated in the solar nebula from which the planets condensed and were further —and continuously— distributed to planetary surfaces where life then emerged (abiogenesis). From the early 1970s it was becoming evident that interstellar dust consisted of a large component of organic molecules. Interstellar molecules are formed by chemical reactions within very sparse interstellar or circumstellar clouds of dust and gas. The dust plays a critical role of shielding the molecules from the ionizing effect of ultraviolet radiation emitted by stars.Several simulations in laboratories and in low Earth orbit suggest that ejection, entry and impact is survivable for some simple organisms.