Choose the description for a star cluster.
emits intense radio and light energy
collapsed star with intense gravitational field
system of stars held together by gravity that can number from a thousand up to a million stars
repeated radio signal
system of many millions or even billions of stars and galactic formations moving together with a gravitational relationship



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Within a classful addressing, ____ is the default subnet mask for a Class C address. 255.255.255.255 255.255.255.0 255.255.0.0 255.0.0.0
Consider an LTI system with impulse response h(t) = sin(4(t - 1))/pi(t - 1) Determine the output of the system for each of the following inputs; (a) x_1(t) = co
When using a(n) ____ join, only rows that meet the given criteria are returned. Select one: a. full b. inner c. outer d. set