For Earth-based telescopes this is not a particularly good idea since the ozone layer in the Earth's atmosphere absorbs some of the UV radiation. For space based telescopes, all wavelengths are useful.
The astronomer studied distant galaxies using a powerful telescope.
Stars
Because in the spring, the night sky is pointed out of the Milky Way and therefore it is easier to see distant galaxies.
A telescope.
the answer is "first".
To view any distant object in space you need a basic $150 telescope.
wavelength shift
The astronomer studied distant galaxies using a powerful telescope.
visible light
He invented a system for classifying galaxy morphologies (shapes). The Hubble Space Telescope is named after him, but he did not invent it.
Stars
The "nucleus".
cuz they are explorers
They study distant galaxies because they want to know whats out in other galaxies and how many planets it has
telescope or maybe binoculars
galaxies
That sounds like the description of a telescope. However, please note that the distance objects need not be "small"; a galaxy, for example, is incredibly large, but most galaxies are so far away that we can still not see them without the help of a telescope.