Portal:Star/Did you know/archive

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  • ... that our galaxy is estimated to contain 200-400 billion stars, more than the number of humans that have ever lived?
  • ... Sirius's name probably comes from a Greek word meaning “sparkling”, or “scorching”?
  • ... the Great Red Spot — a storm on Jupiter that has been going on for 300 years — is so big that dozens of Earths would fit into it?
  • ... the temperature on Mercury varies so extremely that it will rise up to 430 °C during the day and drop as low as -140 °C at night?
  • ... a neutron star has such density that a pinhead of its matter would weigh more than biggest of supertankers?
  • ... the Sun loses 360 million tonnes of material each day, yet it will glow for 5 billion more years?