The weather on Earth can be a little crazy, a little unexpected..
..sometimes that’s nothing compared to the weather on other planets!
Recently, scientists discovered evidence of snowflakes on the Red Planet! These snowflakes, unlike OUR snowflakes, are made of carbon dioxide, or dry ice.
But, there are other differences..
A Martian snowflake is about the size of a human red blood cell. Just so you know – human red blood cells are about 6 to 8 micrometers in diameter (that’s 0.0006 to 0.0008 centimeters!). These Martian snowflakes ranged from 4 to 22 micrometers (0.0004 to 0.0022 cm). Snowflakes on Earth can range from 0.1 cm to 10 cm – MUCH larger than Martian snowflakes! If a person were to stand on Mars while it was snowing, it would probably look more like fog!
So how do these teeny Martian snowflakes form? Carbon dioxide clings to dust in Mars’ atmosphere, eventually causing it to fall to the surface. This is similar to how snowflakes on Earth form – tiny water droplets cling to particles of dust or pollen in the atmosphere, eventually becoming heavy enough to fall to the ground.
Rain forms the same way – the difference between rain and snow involves atmospheric and surface temperatures. Many raindrops actually start out as ice crystals, but melt as they fall to the ground.
Scientists hope to use what they learn from these Martian snowflakes to learn about dust in Mars’ atmosphere.
Clearly, our solar system is still full of surprises!
-Eileen Carmody, weather intern