Earth’s moon is the 5th largest in the solar system. It is Earth’s only natural satellite which came from a chance collision between Earth and another planetary body when the Earth was still young.
Look south around 10pm and you will find the planet Jupiter next to a waxing gibbous moon. The pair will be separated by about 4°
On this date in 1978, Pluto’s moon, Charon was discovered by James Christy. Today we know Pluto has 5 moons; Charon, Hydra, Nix, Kerberos and Styx.
Today is the summer solstice marking the beginning of summer. At 1:03pm the sun will reach its maximum altitude for the year as seen from St. Louis. The solar altitude at this time will be 74.6°.
The sun takes about 225 million years to orbit the central mass of the Milky Way Galaxy. This means that since the sun’s beginning only 20 galactic years have occurred.
If you look towards the zenith around 11pm you will find a bowtie shape of stars. This is the body of the constellation Hercules. It will be between the Summer Triangle and the kite shape of Bootes.
This is the Saint Louis Science Center’s NIGHT SKY UPDATE for the week of Tuesday, June 19. All times are given as local St. Louis time (Central Daylight 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
On this date in 1983, Sally Ride became the first American woman in space. She was one of the STS- 7 crewmembers aboard the Space Shuttle Challenger.
Looking to the east around 2am you will see four stars that form the Great Square of Autumn. Most of the stars in this asterism are part of the constellation Pegasus.
On this date in 1963 Valentina Tereshkova became the first woman in space. This cosmonaut, was launched into space aboard Vostok 6.