2024 is a leap year
A leap year is a calendar year with 366 days instead of 365. This extra day, a leap day, is introduced because a calendar year of 365 days is approximately 6 hours shorter than the tropical year. To prevent the seasons,...
Apollo 11
Energy: Hydrogen applications from the past
The news is dominated by future hydrogen applications, such as hydrogen instead of gas flowing through our current gas pipelines. This is possible with some modifications to your central heating boiler. But there have also been successful hydrogen applications in the past that we have forgotten....
International Day of Manned Spaceflight 12 April 2021
Every year, the International Day of Human Spaceflight is celebrated on April 12. This date is an official UN day under the name 'International Day of Human Space Flight'. This year is a special commemorative year. It is also 60 years...
