One sold for $126,500 in 2009. A star note means that the bill is a replacement for another bill with the same serial number. Stars are really rare, especially in older bills. A 1923 $10 star note ...

Paper banknotes were phased out decades ago. But if you’ve still got some lying around at home, collecting dust, they could ...

Astronomers have discovered a planet that orbits at a 90-degree angle around a rare pair of strange stars—a real-life 'twist' ...

The observations found that HD 144812 is a rare post-red supergiant orbited by a companion star. The finding was reported in a paper published March 25 on the arXiv pre-print server. Yellow ...