Planck (spacecraft)

Planck was like a super-duper camera that flew all the way into space! It wasn't for taking pictures of stars you can see, but for looking at something called the 'cosmic microwave background.' Think of it as the leftover glow from the Big Bang, the giant explosion that started our universe. Planck's job was to make a map of this glow, like a treasure map showing us what the universe looked like when it was just a baby!

Planck had special eyes that could see heat, like a thermal camera. It looked for tiny differences in the temperature of that leftover glow. These differences are like tiny bumps and wiggles in the baby universe.

By finding these wiggles, scientists could learn how the universe grew and changed from a tiny speck into the giant place we see today. It was like looking at a baby picture to understand how someone grew up!

Planck helped scientists understand some really big mysteries. It helped them figure out how old the universe is – it's super, super old! It also helped them learn what the universe is made of, like regular stuff, dark matter, and dark energy. Knowing these things is like knowing the ingredients in a giant cosmic cake! This helps us understand our place in the universe and how it all works.

Planck started its journey in 2009 and flew really far away from Earth to a special spot. For a few years, it worked hard, sending back amazing information. In 2013, it showed everyone its first map of the baby universe glow! After its mission was done, it was sent to a safe place in space so it wouldn't bump into any other important spacecraft. It finished its job perfectly!