The Earth is surrounded by a sea of radiant energy. Most radiant energy that reaches our Earth comes from the Sun and other objects in the galaxy and the universe. Exploding stars and very hot objects give off a lot of light that is invisible to our eyes.
Normal stars radiate at least some of their energy as visible light. Our own Sun and the stars that we see give off a lot of visible light. Warm objects we see on Earth emit infrared radiation. Radio and microwaves come from very cold objects or from electrons moving in space.
Click on the image to see what types of light each of these objects emits.
Dunia imezungukwa na bahari ya nishati yenye kung'aa. Nishati nyingi inayopenya ambayo hufikia Dunia yetu hutoka kwa Jua na vitu vingine katika galaksi na ulimwengu. Nyota zinazolipuka na vitu vyenye joto sana hutoa nuru nyingi ambayo haionekani kwa macho yetu. Nyota za kawaida hutoa angalau sehemu fulani ya nishati yao kama nuru inayoonekana. Jua letu na nyota tunazoziona hutoa nuru nyingi inayoonekana. Vitu vyenye joto tunavyoona duniani hutoa mnururisho wa infrared. Mawimbi ya redio na mawimbi madogo hutoka kwa vitu baridi sana au kwa elektroni zinazosonga angani. Bonyeza picha ili uone ni aina gani za nuru ambayo kila moja ya vitu hivi hutoa.