Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Per OB 1
Directory
References
Discover
Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society
The 10 Greatest Basketball Players of All Time
Coriander leaves, fresh green cilantro on wooden background, herbs
Why Does Cilantro Taste Like Soap to Some People?
The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.
What If the President Is Impeached?
Srinivasa Ramanujan, Indian mathematician and autodidact.
6 Interesting Facts about Srinivasa Ramanujan
Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro
Why Is Christmas in December?
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
World Data Locator Map: Australia
Is Australia an Island?

Per OB 1

astronomy

Learn about this topic in these articles:

stellar associations

  • Centre of star cluster 47 Tucanae (NGC 104), showing the colours of various stars.Most of the brightest stars are older yellow stars, but a few young blue stars are also visible. This picture is a composite of three images taken by the Hubble Space Telescope.
    In star cluster: OB and T associations

    …of an OB association is Per OB 1, at a distance of some 7,500 light-years, which spreads out from the double cluster h and χ Persei. A large group of 20 supergiant stars of spectral type M belongs to Per OB 1. Associations with red supergiants may be in a…

    Read More