Answer: On 22 February 2017, several scientists working at the California Institute of Technology for NASA, using the Spitzer Space Telescope, announced the discovery of seven potentially habitable exoplanets orbiting TRAPPIST-1, a star about 40 light years away. All missions plan to launch in July 2020 during a critical window of alignment between Earth and Mars. In 2020, we'll also see the launch of Europe's Solar Orbiter mission and China's Chang'e-5 mission to the Moon, which will collect and return samples of the lunar soil.
Step-by-step explanation: