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this PDF file
... Earth Asteroids, that can pose threats to the Earth. (ii) Polarimetry is also a very useful diagnostic tool for the planet atmospheres, providing unique information on their structure and the scattering properties of particles in the upper atmosphere. A very important aspect of polarimetric studies ...
... Earth Asteroids, that can pose threats to the Earth. (ii) Polarimetry is also a very useful diagnostic tool for the planet atmospheres, providing unique information on their structure and the scattering properties of particles in the upper atmosphere. A very important aspect of polarimetric studies ...
Our Solar Neighbourhood
... • Surface of the Sun is about 5500 C, core is about 15 000 000 C • Solar wind is release charged particles that flow from the sun at about 400 km/s (we are protected by it on Earth due to our magnetic field) ...
... • Surface of the Sun is about 5500 C, core is about 15 000 000 C • Solar wind is release charged particles that flow from the sun at about 400 km/s (we are protected by it on Earth due to our magnetic field) ...
Astronomy Unit Study Guide
... A. the most abundant element (atom) in the universe B. the “star” in the middle of our solar system C. he formed three law’s of planetary motion D. a cloud of dust and gas in space E. the idea that the sun is the center of the solar system F. he developed a model of a sun-centered solar system G. a ...
... A. the most abundant element (atom) in the universe B. the “star” in the middle of our solar system C. he formed three law’s of planetary motion D. a cloud of dust and gas in space E. the idea that the sun is the center of the solar system F. he developed a model of a sun-centered solar system G. a ...
Our Solar System ppt
... revolves around a planet or dwarf planet (or an asteroid) As of 2008, there are 176 confirmed moons in our solar system Most are located around the outer planets http://earthsky.org/space/video-amazingmoons?utm_source=EarthSky+News&utm_campaign=de0c85 0902EarthSky_News&utm_medium=email&utm_term=0_c6 ...
... revolves around a planet or dwarf planet (or an asteroid) As of 2008, there are 176 confirmed moons in our solar system Most are located around the outer planets http://earthsky.org/space/video-amazingmoons?utm_source=EarthSky+News&utm_campaign=de0c85 0902EarthSky_News&utm_medium=email&utm_term=0_c6 ...
Powers of ten notation
... Gravity • Every mass attracts every other mass through a force called gravity • The force is directly proportional to the product of their masses • The force is inversely proportional to the square of the distance between them ...
... Gravity • Every mass attracts every other mass through a force called gravity • The force is directly proportional to the product of their masses • The force is inversely proportional to the square of the distance between them ...
Understand Planetary Motion
... “Law of Equal Areas” A line segment connecting the sun and a planet will sweep sectors of equal areas in equal time. ...
... “Law of Equal Areas” A line segment connecting the sun and a planet will sweep sectors of equal areas in equal time. ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... One big early surprise (1995) was the ground-based discovery of “hot Jupiters:” gas giants the size of Jupiter in orbits around their parent stars much closer than Venus—or even Mercury—is to the Sun. How does something that massive form so close to a parent star? Would there have been enough materi ...
... One big early surprise (1995) was the ground-based discovery of “hot Jupiters:” gas giants the size of Jupiter in orbits around their parent stars much closer than Venus—or even Mercury—is to the Sun. How does something that massive form so close to a parent star? Would there have been enough materi ...
Quick Reference - Objects in the skies
... A tight, spherical grouping of hundreds of thousands of old stars. Kuiper Belt: The Kuiper belt is a region of the Solar System beyond the planets, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun. It is similar to the asteroid belt, although it is far larger - 20 t ...
... A tight, spherical grouping of hundreds of thousands of old stars. Kuiper Belt: The Kuiper belt is a region of the Solar System beyond the planets, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun. It is similar to the asteroid belt, although it is far larger - 20 t ...
Planet Earth – Could There be Life?
... fluctuate luminosity violently are poor candidates for hosting life The Sun is relatively stable! Solar variation is ~.1% over 11- ...
... fluctuate luminosity violently are poor candidates for hosting life The Sun is relatively stable! Solar variation is ~.1% over 11- ...
Planet Earth – Could There be Life?
... fluctuate luminosity violently are poor candidates for hosting life The Sun is relatively stable! Solar variation is ~.1% over 11- ...
... fluctuate luminosity violently are poor candidates for hosting life The Sun is relatively stable! Solar variation is ~.1% over 11- ...
THE UNIVERSE Celestial Bodies - Joy Senior Secondary School
... Earth is the third planet from the Sun. It is the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets. It is sometimes referred to as the world or the Blue Planet. Earth formed approximately 4.54 billion years ago, ...
... Earth is the third planet from the Sun. It is the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets. It is sometimes referred to as the world or the Blue Planet. Earth formed approximately 4.54 billion years ago, ...
Stellar Properties and Stellar Evolution Study Guide Name Why
... 5. A shock wave may be the stimulus that causes a nebula to start condensing to form new ...
... 5. A shock wave may be the stimulus that causes a nebula to start condensing to form new ...
Astronomy Assignment #1
... and the other planet to be throw into a close non-circular orbit. 9. What would be a good way to search for Earth-like exoplanets around other stars? How could you tell if life was probably present on an exoplanet? NASA’s proposed Terrestrial Planet Finder Mission is designed to search for Earth-lik ...
... and the other planet to be throw into a close non-circular orbit. 9. What would be a good way to search for Earth-like exoplanets around other stars? How could you tell if life was probably present on an exoplanet? NASA’s proposed Terrestrial Planet Finder Mission is designed to search for Earth-lik ...
Slide 1
... •365.25 days for it to complete one revolution around the Sun. •23 hours and 56 minutes for a day ...
... •365.25 days for it to complete one revolution around the Sun. •23 hours and 56 minutes for a day ...
The Whole Darn Thing!
... Terrestrial planets form inside the ice line. Dense, small, no rings/moons, little H and He. Jovian planets form outside the ice line. Light, large, moons/rings, mostly H and He. Mercury, Venus, Earth, Mars, ice line, asteroid belt, Jupiter, Saturn, Uranus, Neptune, Kuiper belt Besides planets, we h ...
... Terrestrial planets form inside the ice line. Dense, small, no rings/moons, little H and He. Jovian planets form outside the ice line. Light, large, moons/rings, mostly H and He. Mercury, Venus, Earth, Mars, ice line, asteroid belt, Jupiter, Saturn, Uranus, Neptune, Kuiper belt Besides planets, we h ...
The Planets in our Solar System Solar System Basics
... • Temperature and distance from the Sun influenced the condensation of various substances within the evolving solar system. • Eventually, the condensing material merged to form large bodies hundreds of kilometers in diameter. ...
... • Temperature and distance from the Sun influenced the condensation of various substances within the evolving solar system. • Eventually, the condensing material merged to form large bodies hundreds of kilometers in diameter. ...
Ch. 20-2 Sun Study Gd. Revised
... 9. The region of the solar system between the orbits of Mars and Jupiter is known as the _________________. 10. Clouds of gas and dust on a comet form a fuzzy outer layer called a _______________________. 11. A spherical region of comets on the outer edges surrounding the solar system is the _______ ...
... 9. The region of the solar system between the orbits of Mars and Jupiter is known as the _________________. 10. Clouds of gas and dust on a comet form a fuzzy outer layer called a _______________________. 11. A spherical region of comets on the outer edges surrounding the solar system is the _______ ...
Bella Nicole and Calli
... The Solar System began 5 billion years ago. There were 9 planets, but scientists think Pluto should not be considered a planet anymore. A solar system is the Sun and the group of planets and bodies that orbit around it. ...
... The Solar System began 5 billion years ago. There were 9 planets, but scientists think Pluto should not be considered a planet anymore. A solar system is the Sun and the group of planets and bodies that orbit around it. ...
File
... Galilei used his telescope and discovered that the Milky Way galaxy was actually made up of many individual stars. Scientists believe that the Milky Way galaxy may contain hundreds and thousands of planets, but they have not been able to discover them all yet. Just as the moon, the Earth, and the su ...
... Galilei used his telescope and discovered that the Milky Way galaxy was actually made up of many individual stars. Scientists believe that the Milky Way galaxy may contain hundreds and thousands of planets, but they have not been able to discover them all yet. Just as the moon, the Earth, and the su ...
Solar system - (SKA) South Africa
... and three dwarf planets are the largest bodies in our solar system. ...
... and three dwarf planets are the largest bodies in our solar system. ...
02-Voyage to the Planets
... explosions from nearby stars Supernova - Huge explosion that occurs after a massive star’s life. Solid matter makes up approximately 1% of the nebula. (rock, ice, iron) ...
... explosions from nearby stars Supernova - Huge explosion that occurs after a massive star’s life. Solid matter makes up approximately 1% of the nebula. (rock, ice, iron) ...
june 2011 - Holt Planetarium
... Zealand survey that scanned the center of the Milky Way galaxy, revealing evidence for up to 10 freefloating planets roughly the mass of Jupiter. The isolated orbs, also known as orphan planets, are difficult to spot, and had gone undetected until now. The newfound planets are located at an average ...
... Zealand survey that scanned the center of the Milky Way galaxy, revealing evidence for up to 10 freefloating planets roughly the mass of Jupiter. The isolated orbs, also known as orphan planets, are difficult to spot, and had gone undetected until now. The newfound planets are located at an average ...
june 2011 - Holt Planetarium
... Zealand survey that scanned the center of the Milky Way galaxy, revealing evidence for up to 10 freefloating planets roughly the mass of Jupiter. The isolated orbs, also known as orphan planets, are difficult to spot, and had gone undetected until now. The newfound planets are located at an average ...
... Zealand survey that scanned the center of the Milky Way galaxy, revealing evidence for up to 10 freefloating planets roughly the mass of Jupiter. The isolated orbs, also known as orphan planets, are difficult to spot, and had gone undetected until now. The newfound planets are located at an average ...
Solar System – GK Notes in PDF
... The Sun is made up of 73% hydrogen and 25% helium. It also has trace amounts of oxygen, carbon, iron and other elements. It is classified as a G-Type Main Sequence Star. It is about 4.6 billion years old and will continue to shine for another 5 billion years. After that it will grow into a Red Giant ...
... The Sun is made up of 73% hydrogen and 25% helium. It also has trace amounts of oxygen, carbon, iron and other elements. It is classified as a G-Type Main Sequence Star. It is about 4.6 billion years old and will continue to shine for another 5 billion years. After that it will grow into a Red Giant ...
Planetary habitability
![](https://en.wikipedia.org/wiki/Special:FilePath/The_Earth_seen_from_Apollo_17.jpg?width=300)
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.