>Bruce McCandless II and Robert L. Stewart astronauts made the first untethered spacewalks in history during Space Shuttle mission STS-41B. McCandless and Stewart used their nitrogen-propelled manned maneuvering units (MMUs) to make the first space walk unattached to any orbital vehicle....
Uranus was discovered by the British astronomer, William Herschel on the 13th of March 1781, but initially reported it (on April 26, 1781) as a "comet". Uranus had been observed on many occasions before its recognition as a planet, but it was generally mistaken for a star. He discovered...
Bunsen Burner Day is a holiday that commemorates the date of birth of the inventor of the Bunsen Burner. While not enjoying the status of being considered a major holiday in any country or group of countries, Bunsen Burner Day has been observed for a number of years. The holiday occurs on the same...
The General Assembly, in its resolution A/RES/65/271 of 7 April 2011, declared 12 April as the International Day of Human Space Flight “to celebrate each year at the international level the beginning of the space era for mankind, reaffirming the important contribution of space science and...
This is a day to honor all those who believe in paranormal experiences as well as those who engage in paranormal activities. Even if you are a diehard skeptic, you can still enjoy this day as an opportunity to hang out and watch scary movies. The term of paranormal has been in the English...
Mole Day is an unofficial holiday celebrated among chemists and chemistry students on October 23, between 6:02 AM and 6:02 PM, making the date 6:02 10/23 in the American style of writing dates. The time and date are derived from Avogadro's number, which is approximately 6.02×1023, defining the...