Astronomical telescope - Study guides, Class notes & Summaries

What is the difference between brightness and luminosity? - Brightness is how it appears to us, distance is a factor. Luminosity is how much total light a star gives off. What is parallax? - Over the course of a year, the star's position in the sky appears to shift back and forth, returning to its original position 1 year later. The amount of this shift— the angle between one extreme in the star's apparent motion and the other— is equal to twice the parallax. You can use parallax to fin...

ASTR 102 Exam Questions With Correct Answers Current Update Which of the following statements about light focusing is not true? A) In a healthy eye, light is focused on the retina. B) Film should be placed at the focal plane in a camera. C) If you try to look at an image that is not formed at the focal plane, it will be blurry. D) The focal plane of a reflecting telescope is always located within a few inches of the primary mirror. - Answer -D) The focal plane of a reflecting telescope...

LUOA Earth Science Module 9 Questions and Answers Graded A+ Newton discovered that the gravity of a planet _________________ as the planet approaches the sun causing the planet to move ____________ around the sun in that part of its orbit. increased, faster Newton discovered that if two planetary objects moved twice as far from each other ______________________. their gravity reduced by 1/4th Explain Kepler's 2nd law of planetary motion, also known as the Law of Areas. Kepler's 2nd law of p...

PHSC 121 FINAL EXAM QUESTIONS AND ANSWERS GRADED A+ Which ancient culture/country not only kept detailed astronomical records, but also seems to have recorded the story of creation and early man in its very language? - Answer-China Which of these reasons describes why astronomy has been practiced throughout history? - Answer-to understand major world events, to understand weather/climate What is the universe? - Answer-Everything physical that existed Given the size of the univers...

Cosmic Address - The galaxies we see through the Hubble Space Telescope Solar System - Sun, Planets and their moons, and anything else floating in space Galaxy - Great island of stars in space all held together by gravity and orbiting a common center Where is Earth's Solar System Located in the Milky Way? - A little over halfway between the galactic center and the edge of the galactic disk Local Group - A small cluster of galaxies Supercluster - Regions of the universe that is ti...

4 ways light interacts with matter - ️️1. emission (lightbulb) 2. absobtion 3. transmission (air, glass) 4. relfection / scattering accretion heat - ️️deposits energy brought by planetismals accretion heat - ️️Heat generated by meteor bombardment (deposits energy brought from planets) Adaptive Optic - ️️technologie that corrects astronomical seeing Angular Resolution - ️️The ability of a telescope to distinguish between adjacent objects in the sky. Asterism - ️️A...

Put the following into perspective: the size of our solar system; the distance to nearby stars; the size of the Milky Way Galaxy; the size of the observable universe. Rank from largest to smallest. To rank items as equivalent, overlap them. correct answers The observable universe, The Milky Way Galaxy, Distances to nearby stars, and The Solar system Light-year: correct answers The distance that light travels in 1 year, which is about 9.46 trillion kilometers. Astronomical Unit: correct an...

heliocentric theory places the sun at the CENTER of the solar system, states that all other bodies in the solar system orbit it. This was in direct contradiction to Ptolemy's geocentric theory, that stated the earth was the center of the universe Nicolaus Copernicus widely credited as the father of the heliocentric theory (sun is the center of the universe) he was not the first to propose the concept but his mathematical model was the first that correctly predicted the movement of the pl...

An optical instrument is said to be ____ if it has reached a principal limit of resolution performance. - Answer diffraction-limited The ocular in a microscope behaves like a(n) - Answer magnifying glass Focal lengths that would be appropriate for the ocular of an astronomical telescope - Answer 2.5 cm, 5 cm