R.O.Y. G. B.I.V
Visible Light is but one part of the entire electromagnetic (EM) spectrum.
EM Spectrum includes all kinds of light
radio waves (all light moves at the same speed -
micro waves light speed)
ultra violet light (some light photons have
x rays shorter wavelengths
gamma rays and more energy than others)
Visible light is only one type of electromagnetic radiation emitted by stars
Each type of EM radiation travels at exactly the same speed - the speed of light!
Not all EM radiation can penetrate Earth’s atmosphere.
Astronomers use different instruments to look at light of different wavelengths - sometimes, we even have to go above Earth’s atmosphere.
SOFIA - the Stratospheric Observatory for Infrared Astronomy
Observations at other wavelengths are revealing previously invisible sights
Map of Orion region
Consider Orion in Different Wavelengths of Light!
Hubble Space Telescope Views of Orion Nebula showing stars hidden in clouds
TODAY’S Sun as seen in visible light from Earth and from space in X-rays by satellites
Observations at wavelengths other than visible light are revealing previously invisible sights
Visible light image
radio wavelength image
High Energy Gamma Rays - Compton Gamma Ray Observatory (GRO) Satellite
The Sky’s emission of Gamma Rays