Believe it or not the Earth is closer to the sun during the winter season but because of the tilt of Earth’s axis we receive less direct sunlight making it cold in the northern hemisphere. Learn about Axial Tilt.
Sirius is the brightest star we see at night. It rises around 9pm and is found southeast of Orion’s Belt. Sirius is a double star. If you have a telescope you may be able to find this faint companion. Learn more about Sirius.
Tomruen [CC BY-SA 4.0], from Wikimedia Commons Over the next few weeks we have a good opportunity to see comet 46P/Wirtanen. This comet will be closest to Earth on December 16. It should be a good binocular target. Learn more about Comet 46P/Wirtanen.
Public Telescope Viewing will be held at the James S. McDonnell Planetarium tonight with the St. Louis Astronomical Society.
The GOES weather satellites are an important tool for scientists forecasting Earth’s weather. They are also critical for monitoring space weather. Learn more at nasa.gov/content/goes
Till Credner [CC BY-SA 3.0], from Wikimedia Commons Look due north tonight around 8pm and you will find the constellation Cassiopeia. We see Cassiopeia most of the year since she is part of our circumpolar sky. Learn more about Cassiopeia
On this date in 1996 the Mars Pathfinder mission launched. This mission included the first rover to explore the surface of Mars which was named Sojourner. Learn more about the Pathfinder Mission.
What would you do if you had sixty minutes to introduce yourself to the basics of computer programming? Computer Science Education Week is a worldwide event designed to help answer that very question and educate people on the importance of computer science. 2018’s Computer Science Education Week starts on December 3rd, falling as it does… Continue reading
Pioneer 10 achieved the first flyby of the planet Jupiter on this date in 1973. Since this mission there have been 8 other spacecraft that flew by or orbited Jupiter. Learn more about Jupiter.
Today near earth asteroid 2018 TG6 will fly by Earth. Its closest approach will be about 4 times the distance to the moon. This 12 meter asteroid poses no threat to Earth. Learn more about tracking small solar system bodies.