That's a spectroscope, usually coupled to the business end of a telescope. The telescope
is responsible for producing enough light from the star for the spectroscope to work with.
Saturn has three main rings. You need a telescope, but they are visible in a small telescope.
Object that only shine with radio waves and not in the visible spectrum an object hidden by dust that block visible light.
Hubble
refractor
Yes, Earth can be seen at night without a telescope. It is visible from space station and other spacecraft. However, it is not visible to the naked eye from the surface of the Earth at night.
A grating or a prism
It is not visible unless you are using a high grade telescope that isn't available to the public and is only used by profession astronomers and scientists.
HST is a Cassegrain reflecting telescope using the Ritchey–Chrétien design, with an aperture of 7.9' (2.4m). It has observational ability in the Ultraviolet, Infrared, and Visible light spectrums.
Pluto is not visible without a telescope.
telescope or maybe binoculars
They can be visible from Earth without the aid of a telescope.
Sunlight appears as a rainbow of colors in a spectroscope because it is made up of a spectrum of different wavelengths of light. When sunlight passes through a prism or a diffraction grating in the spectroscope, it is separated into its component colors, ranging from red to violet. This phenomenon occurs due to the varying degrees of refraction or bending of each wavelength, allowing us to see the full spectrum of visible light. This separation reveals the diverse colors that make up white light.
Saturn has three main rings. You need a telescope, but they are visible in a small telescope.
A radio telescope detects light in the form of radio waves and a refracting telescope detects light in the visible wavelengths
With a good telescope, yes.
No.
Object that only shine with radio waves and not in the visible spectrum an object hidden by dust that block visible light.