What happened to nasa astraunaghts in vacuum of space Did they archieve space travel due to effects on radiation on the human body and temperature differential?

NASA astronauts have successfully traveled to space, where they experience a vacuum environment that poses challenges such as exposure to cosmic radiation and extreme temperature differentials. While radiation can increase the risk of long-term health issues, astronauts are trained and equipped with protective measures to mitigate these risks. The vacuum itself does not directly harm the body immediately, but lack of oxygen can lead to unconsciousness within seconds if not properly protected. Overall, space travel is achieved through careful planning and technology to address these environmental factors.