Cosmos (category filter × )

Scientists observe mysterious cosmic web directly for first time
  • First observation of gas filaments, linking a cluster of galaxies 12bn light years away, provides new insights for theories about the formation of our universe.
  • This finding adds to the theory that, after the big bang, hydrogen gas creates huge threads across space, and galaxies form in clusters of these threads.
  • The observation proved this, as researchers noticed supermassive black holes and galaxies with active star formation at the intersections of hydrogen threads.

We’re going to slam a spacecraft into an asteroid to try to deflect it
  • AIDA (asteroid impact and deflection assessment) is a global cooperation that aims to test if we could save the Earth from an asteroid aimed at our planet.
  • It will target a small asteroid orbiting a bigger asteroid, floating 6.8 million miles away from Earth.
  • NASA will start with DART (double asteroid redirection test), launching a 0,5 ton craft in 2021 to crash into the asteroid 16 months later at 14,700 miles per hour.
  • It will release a satellite before the collision to take images.
  • European Space Agency will then launch Hera, which will arrive at the asteroid in 2028 with more tools to perform a detailed study of the asteroid after the impact.

Astronauts mix cement on ISS, pave way for future space colonies
  • For the first time ever, space cement has been successfully mixed on the International Space Station.
  • On one hand, it seems stronger than Earthly cement because of its surprisingly uniform density, caused by lack of strong gravity.
  • On the other hand, it may be weaker because it develops large air pockets, making it more porous than Earthly cement.
  • The material will be tested further.
  • This research paves the way towards finding out how to create concrete structures on the Moon and Mars.

New date for 'Late Heavy Bombardment' may change life's timeline on Earth
  • There might have been no extraordinary asteroid bombardment -- new theory questions the nature of the event and proposes new date.
  • Implications are big, as this would push back the age of hospitable Earth.
  • First hints of life appeared up to 3.9 billion years ago, so it’s unlikely that the storm happened then.
  • Also, it may have been no extraordinary storm, but just the aftermath of the chaos that occured in the young solar system.
  • Ultimately, the new theory states that Earth couldn’t suffer ocean-boiling, surface-liquifying asteroid strikes since 4.48 billion years ago.

Crab Nebula blasts Earth with highest-energy photons ever recorded
  • The Tibet AS-gamma Experiment has picked up the highest-energy light ever measured.
  • Signal measured at over 100 tera-electronvolts (TeV) is 10 times the maximum energy the Large Hadron Collider sees when smashing particles.
  • Sending the signal might be a pulsar, the core of a post-supernova star, deep inside the Crab Nebula.
  • In total, 24 events greater than 100 TeV were picked up, the most powerful reached 450 TeV.
  • The next challenge for astronomers will be finding signals stronger than 1,000 TeV.




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