The relatively small Earth, with its sizable moon, is the only planet we know of with life on it. Coincidence?
The sun may be far away, but its solar flares still present a deadly risk for astronauts going to the moon.
Why don't lakes have tides as well? To answer this question, we need first to explore what causes ocean tides.
On last count, there were nine planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Soon, however, we might need to add a tenth planet to the solar lineup. Learn more on this Moment of Science.
Unlike Saturn, which has actual, physical rings, the ring you can sometimes see around the moon is merely an optical illusion.
For a long time people have been fascinated by comets passing by the earth. How close are they? Learn more on this Moment of Science.
Why does earth only have one moon, while other planets have many? Jupiter alone has nearly 40 moons! Learn more on this Moment of Science.
Learn about the most distant object to orbit the sun, on this Moment of Science.
Can you see the man in the moon? Learn about pareidolia on this Moment of Science.
Learn about dung beetles and their nightly travels on this Moment of Science.