A rare interstellar comet with unique composition is passing through our solar system, joining only two other known objects from beyond. Researchers are simultaneously mapping the solar system's edge and studying how planets around dead stars hint at our own system's distant future.
·Interstellar comet shows chemistry never before seen, revealing mysterious formation conditions from another star
·New Horizons spacecraft detects unexpected slowdown at the solar system's outer boundary
·Dead star with orbiting planet provides clues to what may happen to Earth's planetary system in billions of years
·Universe survey launches revealing unprecedented detail about cosmic structure and distant objects
·Eight planets now confirmed in our solar system, compared to six known in 1776
drawn from The Conversation, Space, CNN, NASA Science (.gov) · updated 2h ago