X-ray Astrophysics - The high energy cosmos X-radiation is only emitted by the hottest and most energetic...
Mars Missions 2021: Early Discoveries Three new missions arrived at Mars in 2021. This lecture looks at new results from the UAE’s Hope mission, China’s Tianwen-1 and NASA’s Perseverence.
The Limits of Our Knowledge There is much in the universe we will never know, and it is equally certain that we will never know all that we do not know.