SpaceX's Mars Mission, and 3 Exciting Exoplanets!

SpaceX announced plans to launch a Mars mission in 2018 using the Falcon Heavy rocket and Red Dragon capsule. The mission faces challenges, particularly in landing on Mars using supersonic retropropulsion. Meanwhile, astronomers discovered three potentially habitable exoplanets around the ultra-cool dwarf star Trappist-1, which are being studied for signs of life. The video concludes with a call for support from viewers.

What is the significance of the Trappist-1 star in relation to the newly discovered exoplanets?

What are astronomers looking for in the atmospheres of the newly discovered exoplanets?