Astronomy Fact of the Day: September 11, 2018

*Image Credit: Philip Park. CC BY 3.0 The largest star discovered to date is UY Scuti. Located in the summer constellation Scutum, at a distance of roughly 9,500 ly, this red supergiant is roughly 1,700 times larger than our sun. Learn about UY Scuti.

Night Sky Update For The Week of September 11, 2018

This is the Saint Louis Science Center’s NIGHT SKY UPDATE for the week of Tuesday, September 11. 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

Astronomy Fact of the Day: September 10, 2018

*Image provided by ESO/M. Kornmesser. CC BY 4.0 The most massive star discovered to date is R136a1. This is a star that is over 300 times more massive than the sun. It is located 165,000 light years away in the Large Magellanic Cloud. The image shows the relative sizes of young stars, from the smallest… Continue reading

Astronomy Fact of the Day: September 9, 2018

New Moon occurs today starting a new lunar cycle. Our calendar month is based on the lunar phase cycle. The lunar phase cycle lasts about 29.5 days and is called a synodic month. Learn More about lunar phases

Astronomy Fact of the Day: September 8, 2018

Planets are not the only things known to have rings. In 2013 scientists discovered that the 155 mile wide asteroid Chariklo had rings. These rings were discovered as Chariklo occulted a distant star. Learn More about Chariklo

Astronomy Fact of the Day: September 6, 2018

The dwarf planets beyond Neptune are part of a belt of icy bodies known as the Kuiper Belt. On January 1, 2019 the New Horizons spacecraft will fly by another Kuiper Belt object named 2014 MU69. Learn More about the Kuiper Belt and Kuiper Objects

Astronomy Fact of the Day: September 5, 2018

On this date in 1977 the Voyager 1 spacecraft launched into space. During its mission Voyager 1 visited the planets Jupiter and Saturn and in 2012 it became the first spacecraft to leave the solar system. Learn More about Voyager 1

Astronomy Fact of the Day: September 4, 2018

Ceres is the only Dwarf planet in the inner solar system. It is the largest body in the main asteroid belt making up about 54% of all the mass in the belt. Ceres is currently found in the constellation Leo. Learn More about Ceres