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.
Last quarter moon occurs today at 5:20am. The dark patches you see on the moon are ancient lavas that filled huge impact basins. The largest one you see called Oceanus Procellarum.
Earth is the only planet we know that can support liquid water on its surface. There are also two moons thought to have liquid water under their frozen surface. These are Europa and Enceladus.
On this date in 1962 the first Orbiting Solar Observatory (OSO-1) was launched. It primarily studied the UV, x-ray and gamma ray output of the Sun.