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15-1 Notes - westscidept
15-1 Notes - westscidept

... use a ________________ to separate a star’s light into a spectrum. The spectrum gives information about the ______________ and temperature of a star. When a chemical element emits ________, only some colors in the spectrum appear. These are called ____________ lines. The __________ atmosphere of a s ...
Improving the Gaia planet catch by combining the astrometry with
Improving the Gaia planet catch by combining the astrometry with

... Astrometry is a promising technique for exoplanet research. It allows us to determine all the orbit parameters and the accurate mass of the planet. Gaia will be the first space mission to reach astrometric precision capable to detect planetary companions around stars brighter than 15th mag. Astromet ...
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Terrestrial Planets

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Gravity-mod

... ace-environment/1-what-travels-in-an-orbit.html • What travels in an orbit? • Almost all of our neighbors in space are in orbit around something: • All of the planets are in a circular or elliptical orbit around the Sun. • Our moon and the moons of the other planets are in orbit around their planets ...
Test 3 Review
Test 3 Review

... • Get plenty of rest the night before • Bring at least 2 pencils, UNM student ID, and a calculator 2) During the Test: • Write out and bubble your last name, space, first name and Exam color in the name space of the scantron form. Write out and bubble your Banner ID in the ID space. • Draw simple sk ...
Complete the “Assess Your Understanding” including
Complete the “Assess Your Understanding” including

... ________________________________________________________ How does a star form and what determines its life span? A star is “born” when the contracting gas and dust form a _________________ so ________________ and ____________ that _________________________ starts. How long a star “lives” depends on ...
Document
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Astronomy

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Neither Star nor Planet - Max-Planck
Neither Star nor Planet - Max-Planck

... dwarfs. The frequency of binary systems, which she investigates, is also interesting in this respect. The researcher was one of the first to use high-resolution spectroscopy to look for companions of brown dwarfs. Very large telescopes are necessary to apply this method, which is known from the sear ...
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General exercise model answer Exercise 1 page 90 to 93 Question

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"Stars" pdf file

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Colorado Model Solar System
Colorado Model Solar System

... Designate one person in your group to count paces between the planets and another person to time the trip. Walk at a normal pace between the Sun and Mercury and record your paces and time values in columns 1 and 2 of Table 1. Use the information given on the plaque to fill in columns 3-8 of Table 1 ...
Planetary Orbit Simulator – Student Guide
Planetary Orbit Simulator – Student Guide

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Science Olympiad 2008 Reach for the Stars Division B
Science Olympiad 2008 Reach for the Stars Division B

... most determines how they will differ? A) location where they are formed B) time they are formed C) luminosity they are formed with D) mass they are formed with E) color they are formed with 111. The spectral sequence sorts stars according to: (choose as many as apply) A) mass B) surface temperature ...
Lecture 2
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... separation is made because of different deformational properties in the mantle inferred from seismic wave measurements. (1) The upper layer is stiff. It is presumed that if the entire mantle had been as stiff, the outer shell of the earth would have been static. This stiff layer of the mantle and th ...
Distribution of Elements in the Earth`s Crust
Distribution of Elements in the Earth`s Crust

... collapses. The collapse drives pressures and temperatures to levels so high that fusion reignites, forming elements heavier than iron, and the star explodes violently. Our solar system, planet, and life on Earth all owe their existence to supernovae, since they all require large quantities of heavy ...
Astronomy 112: Physics of Stars Problem set 1 solutions 1
Astronomy 112: Physics of Stars Problem set 1 solutions 1

... we want to calculate the masses of the two stars, M1 and M2 . For simplicity we will assume that the orbit is circular, with semi-major axis a. The orbital plane of the binary is inclined at an unknown angle i relative to the plane of the sky, where i = 0 corresponds to an orbit that is perfectly fa ...
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Solar System Lesson Organizer
Solar System Lesson Organizer

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Star in a Box

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Extension worksheet – Topic 6 - Cambridge Resources for the IB
Extension worksheet – Topic 6 - Cambridge Resources for the IB

... Mark scheme for Extension Worksheet – Option E, Worksheet 1 ...
Part II: Ideas in Conflict.
Part II: Ideas in Conflict.

... a spherical shell which rotate around the earth.  An alternate model, which works just as well, is for the earth to rotate inside the shell of stars.  In order to explain the motion of all the other celestial bodies, more spherical shells must be added to this model. ...
The First Stars - Amazon Web Services
The First Stars - Amazon Web Services

... see no relic stars totally lacking in heavier elements such as iron, as would be the case if there was a component of low mass objects in the first generation of stars. We infer that during their short but brilliant lives, aided by large numbers of star-forming dwarf galaxies, also teeming with mass ...
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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.
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