The faintest stars visible to the naked eye are called:

$A$ bright star is indicated to have a brightness magnitude of $-5$ compared to a star of brightness zero magnitude. It means that this star,compared to the reference star of zero brightness,is:

$A$ Black Hole is:

Venus looks brighter than other stars because

The flash spectrum confirms a/an:

$A$ total solar eclipse is observed from the Earth. At the same time,an observer on the Moon views the Earth. She is most likely to see ($E$ denotes the Earth):