99 & 44/100ths percent pure


Astronomers have discovered a star with almost no impurities – just hydrogen and helium (and faint traces of calcium) – very unusual! Shouldn’t exist because mass is too low to have coalesced to form in the first place. Very primitive because amt of metals tells how old the star is. Japanese ready to test space junk cleaner; The idea -metal strands attached to dead satellites that will generate electricity as they drag through magnetic field, creates drag pulling satellite into a lower orbit (now 500 – 900 miles up; 20,000 objects). Planets great in the morning sky!

Want a digest of WHYY’s programs, events & stories? Sign up for our weekly newsletter.

Help us get to 100% of our membership goal to support the reporters covering our region, the producers bringing you great local programs and the educators who teach all our children.