On this date in 1965 cosmonaut Alexei Leonov became the first human to walk in space. On June 3rd of the same year Ed White became the first American to spacewalk.
New moon occurs today. It takes the moon 29.5 to go from new moon to new moon. This is called a synodic month which is the base for our months.
It takes the moon 27.5 days to complete one revolution of the Earth. This is called a sidereal month. We do not see a full cycle of lunar phases during this period of time.
Today Mercury reaches greatest eastern elongation. You can find Mercury in the west about 40 minutes after sunset. If you look due west it will be about 9° above the horizon.
Celebrate Pi day by finding the circumference of Uranus. You can find the planet’s circumference by multiplying Uranus’s diameter (31,518 miles) by Pi (3.14159).
William Herschel discovered the planet Uranus on this date in 1781. Originally Herschel wanted to call this planet Georgian Sidus, “George’s star” in honor of England’s King George III.
This is the Saint Louis Science Center’s NIGHT SKY UPDATE for the week of Tuesday, March 13. All times are given as local St. Louis time (Central Standard Time). For definitions of terminology used in the night sky update, click the highlighted text. Information updated weekly or as needed. Join us for our next star… Continue reading
Everyday about 60 tons of meteor dust falls to Earth. Some microscopic meteorites may even be collecting on your roof. Run a magnet on the ground near your gutters down spout and you may find a few.
Look to the southwest around 9pm and you will see six bright stars that form the winter circle. The bright star on the bottom is called Sirius which is the brightest star in the night sky.
Tomorrow marks the beginning of daylight savings time. So remember to set your clocks one hour forward before you go to bed.