4. “Remember to look up at the stars
and not down at your feet. Try to
make sense of what you see and
wonder about what makes the
universe exist. Be curious.”
-Stephen Hawking
6. Radio Astronomy
Biggest Radio Telescope in China/Image Source: Universe Today
“Astronomy based on radio wave”
Wavelength range of radio wave: 1 mm-100km
Sources: Quasars, Pulsars, Dust Clouds
7. Microwave Astronomy
Baby Picture of the universe/Image Source: European Space Agency(ESA)
“Astronomy based on microwave radiation”
Wavelength range of microwave radiation: 1mm-100cm
Sources : Cosmic Microwave Background Radiation,
Supermassive Black Holes
8. Infrared Astronomy
Near-Infrared View of Uranus/Keck Observatory, Hawaii
“Astronomy based on infrared ”
Wavelength range of infrared: 700 nm-1mm
All bodies with temperature emit infrared radiations
9. Optical Astronomy
Hubble Ultra Deep Field Image in visible range /NASA
“Astronomy based on visible light”
Wavelength range of visible light : 400nm-700nm
Largely affected by light pollution
10. Ultraviolet Astronomy
Image Source: NASA
“Astronomy based on ultraviolet radiation”
Wavelength range of ultraviolet radiation:10nm-320nm
Sources : supernova remnants, very hot stars, and nova.
11. X-Ray Astronomy
Aurora of Jupiter in X-Ray/Chandra X-Ray Observatory (NASA)
“Astronomy based on X-Rays”
Wavelength range of X-Rays: 1 Å -10 Å
Sources : Pulsars, Galaxies, Moons, Super massive black holes
12. Gamma –ray Astronomy
Solar flare of 2013- Fermi Gamma Ray Space Telescope (NASA)
“Astronomy based on radio wave”“Astronomy based on radio wave”
“Astronomy based on Gamma rays”
Wavelength range of Gamma rays: <10 Pico meter
Sources : Accretion disks, neutron stars ,pulsars, supernova
explosions, radioactive decay