The HI-SEAS experiments in Hawaii are simulated Mars missions where crews cope with the stress of a real Mars mission tests of new launch vehicles for a future Mars mission attempts to grow crops in a simulated Mars environment computer simulations of Mars's climate over the past 500 million years The Apollo astronauts reported sometimes seeing random bright flashes during their missions to the Moon. These were caused by occasional malfunctions in the spacecraft's electrical system Galactic Cosmic Rays (GCR) impacting their retinas dust grains striking the surface of the spacecraft and "exploding" the solar wind impacting their retinas

The HI-SEAS experiments in Hawaii are simulated Mars missions where crews cope with the stress of a real Mars mission tests of new launch vehicles for a future Mars mission attempts to grow crops in a simulated Mars environment computer simulations of Mars's climate over the past 500 million years The Apollo astronauts reported sometimes seeing random bright flashes during their missions to the Moon. These were caused by occasional malfunctions in the spacecraft's electrical system Galactic Cosmic Rays (GCR) impacting their retinas dust grains striking the surface of the spacecraft and "exploding" the solar wind impacting their retinas

		simulated Mars missions where crews cope with the stress of a real Mars mission
		tests of new launch vehicles for a future Mars mission
		attempts to grow crops in a simulated Mars environment
		computer simulations of Mars's climate over the past 500 million years

		occasional malfunctions in the spacecraft's electrical system
		Galactic Cosmic Rays (GCR) impacting their retinas
		dust grains striking the surface of the spacecraft and "exploding"
		the solar wind impacting their retinas