Orbiting Astronomical Observatory-2

Directory

References

Discover

Thanksgiving Turkey with all the sides

Why Do We Eat Turkey on Thanksgiving?

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

Woman tied to a ducking stool, a method of punishment by means of humiliation, beating, or death. (cucking stool)

8 Unusual Punishments Inflicted on Women Throughout History

Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint

8 of the Largest Empires in History

Thanksgiving Celebration Traditional Dinner Setting Food Concept

Why Is Thanksgiving in the U.S. Celebrated on a Thursday?

Diverse elementary school children wearing school uniforms running outside of school. Boys girls

Pro and Con: School Uniforms

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Orbiting Astronomical Observatory-2

United States satellite

Also known as: OAO-2

Learn about this topic in these articles:

Orbiting Astronomical Observatories

In Orbiting Astronomical Observatory
OAO-2, launched Dec. 7, 1968, carried two large telescopes and a complement of spectrometers and other auxiliary devices. It weighed more than 4,200 pounds (1,900 kg), the heaviest satellite orbited up to that time. OAO-2 was able to photograph young stars that emit mostly ultraviolet…
Read More