Universe explains SpaceX Just Re-Used a Rocket. Why This Changes Everything ""
On April, 7th, 2017, Jupiter will come into opposition with Earth. This means that Earth and Jupiter will be at points in their orbit where the Sun, Earth and Jupiter will all line up. Not only will this mean that Jupiter will be making its closest approach to Earth – reaching a distance of about 670 million km (416 million mi) – but the hemisphere that faces towards us will be fully illuminated by the Sun.
The Juno mission has made some remarkable finds since it reached Jupiter in July of 2016. During the many orbits it has made around Jupiter’s poles – which occur every 53 days – some stunning imagery has resulted. Not only have these pictures revealed things about Jupiter’s atmosphere, they have also been an opportunity for the public to participate in the exploration of this giant planet.
Mark and Scott Kelly are the only twins that have ever traveled to space — and their experience will be invaluable if we want to get to Mars one day.
Between 2015 and 2016, Scott spent 340 days on the International Space Station, while his genetically identical twin Mark stayed on Earth to function as a control subject. Before, during, and after Scott’s trip, the brothers have been giving NASA numerous biological samples — blood, saliva, poop, you name it. By comparing Scott’s samples with Mark’s, NASA is trying to understand what long-term space travel does to our bodies.
Some preliminary findings have already come out. One study showed that Scott’s DNA changed while he was in space: his telomeres — the protective caps on the end of DNA strands — were unexpectedly longer than Mark’s. (Telomere length can affect aging and age-associated diseases.) Another study showed that there were major fluctuations in Scott’s gut bacteria while he lived in zero-g compared to his twin.