Space-time is a concept used to describe a medium that extends throughout the universe. It helps explain how gravity bends light around large objects, as an object is said to warp space-time and therefore creates a distortion which light follows.
Stars (of which our sun is one) are the only sources of light in space. Planets, moons, asteroids, comets, etc. all simply reflect starlight.
Light waves, like all electromagnetic waves, travel without a medium, so they can travel through empty space. Sound waves, on the other hand, do require a medium to travel or propagate; therefore, they can not travel through empty space.
NADPH
It doesn't have mass or take up space. <><><><><> Light is energy, and energy is matter, according to Einstein. Besides, it has been proved that light is affected by Gravity and, in order to do that, it has to have mass. Look again at Einstein and others, such as Lorentz... The photon has no mass, or does it? True, it seems to have no mass, but that is at rest state. Multiply that by infinity to account for mass increase and time dilation due to traveling at the speed of light, and what do you get? Something that looks like a particle, having mass, traveling at the speed of light.
no
Airways, Breathing and CPR (used to be circulation)
yes it is used in space crfts and space suit to protect them from heat and light
Lifesaving Medal was created on 1874-06-20.
Damariscove Lifesaving Station was created in 1897.
It makes it not dark, or less dark, depending on the exact amount of light (lumens) used in the space.
Point Allerton Lifesaving Station was created in 1889.
Albert Medal - lifesaving - was created on 1866-03-07.
Rest Immobilize Cold Elevate It's used for treating bruises and sprains.
who was trying to obtain a lifesaving drug for his wife
Distance in space is measured in 'light years' or in 'scientific notation'
Units of volume are. For big distances, astronomers use "light years" and "parsecs". A light year is the distance that light travels through space in one year.