Galaxies - Study guides, Class notes & Summaries

The cosmic calendar - a imaginary concept to examine the history of our planet compressed into one year-Carl Sagan, human civilzation doesn't come on the scene until almost the last few seconds. This made people realize how insignificant human society is on the grand scale of time and the imense universe especially in the human-centerd view of religions. planet - A large body in space that orbits a star and does not produce light of its own star - A ball of hot gas, primarily hydrogen and...

What is an astronomical unit (AU)? - correct answer Distance between the earth and the sun What is the zodiac? - correct answer The band of sky where the sun, moon, and planets are found What is the reason we see different constellations at different times of the year? - correct answer The earth orbits the sun Describe how the pointer stars in the Big Dipper are used to find Polaris. - correct answer The pointer stars are the two stars at the far end of the bowl from the handle. Mot...

Using the ideas discussed in the text, in what sense are we "star stuff"? - Nearly every atom from which we are made was once inside of a star When did humans learn that the Earth is not the center of the universe? - Within the past 500 years How are galaxies important to our existence? - Galaxies recycle material from one generation of stars to the next, and without this recycling we could not exist. If we imagine the history of the universe compressed into one year, dinosaurs walked...

Test Bank For Astronomy 1st Edition by Andrew Fraknoi 8284, 3 Chapter 1: Science and the Universe: A Brief Tour Chapter 2: Observing the Sky: The Birth of Astronomy Chapter 3: Orbits and Gravity Chapter 4: Earth, Moon, and Sky Chapter 5: Radiation and Spectra Chapter 6: Astronomical Instruments Chapter 7: Other Worlds: An Introduction to the Solar System Chapter 8: Earth as a Planet Chapter 9: Cratered Worlds: The Moon and Mercury Chapter 10: Earthlike Planets: Venu...

Science Bowl Practice Questions With Verified And Updated Answers Math; Multiple Choice: If the determinant of a matix is zero, the matix is said to be W.) an Eigen-matrix X.) singular Y.) invertible Z.) Gaussian - answerX.) singular Math; Multiple Choice: Matrix multiplication differs from scalar multiplication in that matrix multiplication is not W.) commutative X.) associative Y.) distributed over addition Z.) well-defined - answerW.) commutative Physics; Multiple Choice: materia...

Light year definition correct answers The distance light travels in one year Light year distance correct answers 9.5*10^12 km Astronomical Unit (AU) definition correct answers Average distance from the Earth to the Sun AU distance correct answers 1.5*10^8 km Galaxy correct answers A great cloud of stars, gas, and dust held together by the combined gravity of all its matter Planetary Systems correct answers A set of gravitationally bound non-stellar objects in orbit around a star o...

Explain why we see objects at great distances as they were in the distant past Ans- -The universe is constantly expanding -an observer in any galaxy sees more distant galaxies moving away faster -Distances and speeds help determine the universe is expanding Summarize the major cosmic events that prepared the way for life on Earth Ans- -Big Bang created matter -Gravity pulled that matter together to form galaxies -Galaxies created stars alongside nuclear fusion -Stars created elements nec...

Aristotle believed that .... A. the Earth rotated around the Sun B. the Sun rotated around the Earth C. the Sun and the Earth rotated around a common gravity spot D. the Earth and Sun both stand still correct answers B. Buffon thought the world was about __________ years old. 1000 7500 75,000 7,500,000,000 correct answers C. The "Father of Modern Geology" is .... A. Strabo B. Steno C. Lyell D. Hutton correct answers D. Venus is a _____________. Gas Giant Terrestri...

AU-astronomical unit Correct Answer-Earth's average distance from the sun. Used to describe distance within the solar system Light Year- ly Correct Answer-Distance light can travel. which is about 10 trillion km. Used to describe distance of stars and galaxies. measure of distance not time. Solar system Correct Answer-consists of sun,planets, and their moons; which is held together by a common center. Local Group Correct Answer-more than 70 galaxies put together galaxy clusters Corr...

Astronomy - Final Exam With Complete Solutions 100% Solved How are galaxies created? ️️One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. ... The other, which has gained strength in recent years, says the young universe contained many small "lumps" of matter, which clumped together to form galaxies. How was Hubble important to our understanding of galaxies? ️️he discovered the existence of ...