Calán/Tololo Survey

The Calán/Tololo Survey was like a super-detective mission for space! Scientists used giant telescopes to look at millions of stars. Their goal was to find stars that were a little bit wobbly.

A wobbly star might mean there's a planet hiding nearby, like a secret friend! These telescopes were like super-powered eyes, helping us learn more about our amazing universe and the planets that might be out there.

This amazing star hunt started a long, long time ago, in 1996. It was a big project that lasted for many years. Scientists worked together, using powerful telescopes in Chile, a country far away. They pointed these giant eyes at the sky, night after night, looking for those tell-tale wobbles. It was a patient job, like waiting for a seed to grow into a big plant, but with stars!

Finding new planets is super exciting because it helps us understand if we are alone in the universe. Imagine finding a planet that's just like Earth, or maybe even has aliens! The Calán/Tololo Survey helped scientists discover many new planets, called exoplanets. These discoveries are like finding new toys in a giant toy box, showing us how many amazing things are out there waiting to be found.

The telescopes used in the Calán/Tololo Survey were very special. They could measure the light from stars very, very carefully. When a planet goes around a star, it pulls on the star just a tiny bit, making it wobble. The telescopes could see this wobble by noticing if the star’s light was shifting slightly. It’s like seeing a tiny ripple in water when a small stone is dropped in.