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Terms in this set (21)Protostar a young star in the early stages of formation (nuclear fusion begins and it is officially classified as a star); Red giant star's fuel begins to burn out, causing it to expand outward; the stage after Main Sequence for an average mass star (stage 4) Main sequence The longest part of a star's life - about 90% of all stars are in this stage (including our sun); Planetary nebula a ring-shaped nebula formed by an expanding shell of gas around an aging star (step 5 in life cycle of an average mass star) White dwarf a star that has exhausted all of its nuclear fuel; planet sized and very dense (step 6 in life cycle of avgerage mass star) Supernova The stage of a high mass stars life (step 5) when it explodes to expand into space creating a burst of light and heat. Neutron Star Created when giant stars die in supernovas and their cores collapse, with the protons and electrons essentially melting into each other to form neutrons. Black hole An object whose gravity is so strong that nothing, not even light, can escape - step 6 in life cycle of extremely high mass star Magnitude The brightness of a star Light year the distance light travels in one year - about 5.88 trillion miles Absolute Magnitude How much light is actually given off by a star Apparent Magnitude how bright a star will appear to an observer on Earth Luminosity measure of a star's brightness Hertzsprung-Russell Diagram Shows the brightness, absolute magnitude, color, temperature and class of a star The Sun It is located in the main sequence on the H-R diagram Nuclear Fusion Allows stars to produce energy through converting hydrogen to helium 8 minutes The time it takes for the light from the Sun to reach Earth Nebula A large cloud of dust and gas in
space; Black Dwarf a dead star that no longer gives off light or heat (step 7 in life cycle of average mass star) Red Supergiant The stage in the life cycle of a massive star during which the star increases in size and becomes very bright. (step 4 for high mass stars) Neutron Star the very small, very dense remains of a dead high-mass star after a supernova (step 6) Students also viewedAstronomy Unit 49 terms lindamorton 2022 Sociology: Chapter 1 and 335 terms Mrs-Reyda Scientific Revolution16 terms ncaughel Exprésate 2-4-2 Body Parts38 terms SrHindman Sets found in the same folderStars14 terms Melissa_Weenink Planets and Gravitational Pull20 terms Melissa_Weenink Galaxies9 terms Melissa_Weenink HR Diagram36 terms Melissa_Weenink Other sets by this creatorEvidence of chemical reaction 219 terms Melissa_Weenink Evidence of a Chemical Reaction14 terms Melissa_Weenink Continental Drift Theory9 terms Melissa_Weenink 8th Grade US History STAAR Review194 terms Melissa_Weenink Verified questions
astronomy Why does the Moon create tidal bulges on both sides of Earth instead of only on the side of Earth closest to the Moon? Verified answer
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astronomy Why is the simultaneous detection of methane and oxygen in an atmosphere a good indication of the existence of a biosphere on that planet? Verified answer Recommended textbook solutions Interactive Science: Astronomy and Space ScienceSavvas Learning Co 262 solutions Foundations of Astronomy12th EditionDana E. Backman, Michael A. Seeds 541 solutions Foundations of Astronomy12th EditionDana E. Backman, Michael A. Seeds 541 solutions Foundations of Astronomy10th EditionMichael A. Seeds 240 solutions Other Quizlet setsMusculoskeletal test 144 terms balybar Principals 1 infection/history exam 184 terms jeremy_heller1 Environmental Exam 388 terms rlp2149 GERD19 terms michael_nguyen718 Flickr Creative Commons ImagesSome images used in this set are licensed under the Creative Commons through
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What is the initial stage of all stars?A STAR IS BORN – STAGES COMMON TO ALL STARS All stars start as a nebula. A nebula is a large cloud of gas and dust. Gravity can pull some of the gas and dust in a nebula together. The contracting cloud is then called a protostar.
What is the first stage of a star's life quizlet?Stars start out with a nebula, which is a large cloud of gas and dust that soon collect into a star. This causes the first and longest stage of a stars life, the main sequence. After this stage, stars expand into a red giant, the shortest stage of a stars life.
What is the first step in the life cycle of a star called?The gas in the nebula begins to glow. This is the first step in the life cycle of a star. It is called a protostar. This chemical change gives off a large amount of energy in the form of heat.
What is the starting phase of the formation of stars quizlet?Star formation begins when gravity begins to dominate over heat, causing a cloud to lose its equilibrium and start to contract. A very large interstellar cloud (spanning tens of parsecs) provides the initial stage of star formation.
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What is the initial stage of all stars quizlet?
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