Which planet has the longest day of any planet in our solar system?

  • Mars
  • Venus correct

    Venus takes the gold medal on having the longest day of any planet in our solar system. It takes 224.65 days to complete each orbit. This is a little less than a year on Earth. But rather than a similar rotational period to Earth’s 24 hours, Venus takes 243 days to rotate once.

  • Saturn
  • Neptune
  • ON A DAY
  • Fact of the day

    Leonardo da Vinci could write with one hand while simultaneously drawing with the other.
  • This day in 1882

    German scientist Robert Koch discovers bacillus cause of TB

    • Harry Houdini

      Budapest, Austria-Hungary
    • Peyton Manning

      41 years old | New Orleans, Louisiana
    • Clyde Barrow

      Ellis County, Texas
    • Star Jones

      55 years old | Badin, North Carolina