How SpaceX Launched the World's Most Powerful Rocket

SpaceX's Falcon Heavy rocket successfully completed its maiden test flight, launching a Tesla Roadster into orbit around the Sun. The Falcon Heavy, now the most powerful operational rocket, aims for future missions to Mars and low Earth orbit. Meanwhile, astronomers discovered planets outside the Milky Way using microlensing, marking a significant milestone in space exploration.

What challenges do astronomers face when trying to observe planets in other galaxies?

What is microlensing and how does it differ from gravitational lensing?

What does the discovery of planets outside the Milky Way signify for astronomers?