ASTRON 2B03 Study Guide - Midterm Guide: Radiography, Photon, Atomic Number
13 Feb 2019
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You and your friend recede from each other in spacecraft in deep space. From your frame of reference, your friend is receding at a speed of 0. 7c. Frequency, is: infrared - ultraviolet - visible - radio, xray - ultraviolet - visible - radio, radio - infrared - visible - xray, ultraviolet infrared - visible radio, they all have the same frequency. 2: you are asked to determine an accurate distance to the andromeda galaxy. Sun while star b is 150 light-years from the sun. Hubble"s law indicates that: a spaceship moves by you at a high speed. Milky way and the our nearest neighbour (andromeda) by a factor of: a few tens, a hundred, a thousand, a million, a billion. A black hole and a normal star have the same mass. 5: an astronomer finds an object at a distance of 1000 lightyears from earth.
