This little dot is Earth about 6 Billion kilometers away (3.7 billion miles) taken by Voyager 1, as it was leaving our solar system. Launched 5 Sept, 1977.
A legendary experiment on the moon, a hammer and feather dropped from the same height, reach the lunar surface simultaneously without air resistance, all objects fall at the same rate (regardless of mass) as predicted by Galileo, over 400 years earlier.
Pluto’s ice mountains. Frozen plains and layers of atmospheric haze backlit by a distant sun, as seen by the New Horizons spacecraft. Credit: NASA/JHUAPL/SwRi