Hubble, America's space telescope

The Science of Radio Astronomy - National Radio Astronomy Observatory

Astronomical Telescopes: Explanation, Magnification and Formula

Mysterious never-before-seen deep space radio signal found beyond Milky Way

Unknown space object beaming out radio signals every 18 minutes remains a mystery

What’s a pulsar? Why does it pulse?

A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. We receive a radio pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. The pulsar in the Crab nebula has a period of rotation of T=0.033  s that is increasing at the rate of 1.26 ×10^-5  s / y. (a) What is the pulsar's angular acceleration α? (b) If αis constant, how many years from now will the pulsar stop rotating? (c) The pulsar

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