We couldn’t let this (often commercial, hetero-normative) holiday pass by without sharing these adorkable exoplanet valentines from @nasa!
The website has great scientifically accurate & detailed explanations of each one (after a couple clicks, e.g.), so even Pedantic Astronomer is a Romantic Astronomer today!
“Like its predecessor, the Viking 2 mission consisted of a lander and an orbiter designed to take high-resolution images, and study the Martian surface and atmosphere. Both the Viking 1 and 2 landers benefited greatly from their orbiting counterparts, which snapped images that helped mission controllers navigate the landers to safe landing sites.”
This particular image was taken by the Viking 2 Orbiter and shows a massive dust storm on the red planet. This spectacular storm can be seen on a global scale. The Viking 2 mission would end 3 years later on April 11, 1980.
Prolonged space travel takes a severe toll on the human body. As we seriously consider the human species becoming space-faring, a big question stands. Even if we break free from Earth’s orbit and embark on long-duration journeys among the stars, can we adapt to the extreme environments of space?
Without an atmospheric barrier and a magnetic field like Earth’s, most planets and moons are bombarded with dangerous subatomic particles, like ionizing radiation.
These particles can pass through nearly anything and would cause potentially cancerous DNA damage to space explorers. So, to survive as a species during space travel, we’d have to develop methods to quickly program protective abilities into ourselves. A beta version of these methods is gene therapy, which we can currently use to correct genetic diseases.
Now, what if we could turn the tables on radiation? Human skin produces a pigment called melanin that protects us from the filtered radiation on Earth.
Melanin exists in many forms across species, and some melanin-expressing fungi use the pigment to convert radiation into chemical energy. Instead of trying to shield the human body, or rapidly repair damage, we could potentially engineer humans to adopt and express these fungal, melanin-based energy-harvesting systems. They’d then convert radiation into useful energy while protecting our DNA. This sounds pretty sci-fi, but may actually be achievable with current technology.
Check out what else scientists have up their sleeves in the TED-Ed Lesson Could we survive prolonged space travel? – Lisa Nip