Two reasons why it's unavailable (for now): first, BPM 37093 is a star about to die, and we're talking about its cristallized carbon nucleus. Second, it's 50 light years away from earth.
Calcite crystals occasionally show phosphorescence or fluorescence, but they are also display birefringence (or double refraction). This strong birefringence causes objects viewed through a clear piece of calcite to appear doubled!
Its name is a combination of the first letters of the names Armstrong, Aldrin and Collins. It was first brought back in 1969 from Tranquility Base on the Moon.
An estimated 560,000 to 1,400,000 barrels of oil leak into the Gulf of Mexico each year, from natural sources. Fortunately, most of this oil is degraded by oil-eating bacteria
Angmar, Dolmed, Doom, Erebor, Misty or Moria Montes... Saturn's moon also harbours small hills (or colles) named after J.R.R. Tolkien's characters, such as Bilbo, Gandalf or Faramir
