HUBBLE

from a telescope to the first space telescope and a little theoretical physics   Telescopes are built, and have been built, as high as possible, […]

MOON

our planet’s   The Moon began to take shape 4.5 billion years ago. It was formed from of a collision between our Earth and a […]

MAGNITUDE

the unit of measurement of the brightness of a celestial object   However, there is the apparent magnitude (m), which is the brightness observed from […]

THE STARS

What are stars? Large, high-temperature celestial bodies with their own light and energy, gas clouds.   But how are they created? Gravity and hydrogen, then […]

STRATOSPHERE

home of the Ozone   The layers of our atmosphere from sea level to outer space: troposphere (mountain peaks, airplanes), stratosphere (ozone, meteorological balloons, Armrstrong […]

VOYAGERS

the best-known space probes and a few words about their predecessors   Because the Voyagers are not the first planetary probes equipped with our messages […]