Modern telescopes

Refracting telescopes- telescopes that rely in refraction, or bending of light by lenses

Reflecting telescopes- curve mirrors to focus light

Catadioptric telescopes- large mirrors to collect a lot of light but have short tubes for portability

Radio telescopes- look like a satellite dish. Collect and focus radio waves or micro waves from space

Space telescopes- they orbit earth's atmosphere in space. And can carry instruments to observe objects emitting various types of electromagnetic radiations