North American Nebula

North American Nebula

      (catalog number NGC 7000), ionized-hydrogen region in the constellation Cygnus. The nebula is a cloud of interstellar gas ionized from within by young, hot stars. Interstellar dust particles in part of this cloud absorb the light emitted by recombining atoms. The shape of the nebula roughly resembles that of North America, with the dusty region being shaped like the Gulf of Mexico. The North American Nebula is approximately 520 parsecs (1,700 light-years) from the Sun. It has a diameter of about 30 parsecs (100 light-years) and a total mass equal to about 4,000 solar masses.

* * *


Universalium. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • North America Nebula — This image layout reveals how the appearance of the North America nebula can change dramatically using different combinations of visible and infrared observations. Observation data: J2000.0 epoc …   Wikipedia

  • North Atlantic Books — Founded 1974 Country of origin United States Headquarters location Berkeley, California Distribution Random House Publisher Services Publication types Books …   Wikipedia

  • Nebula Award for Best Novelette — Winners of the Nebula Award for best Novelette. The stated year is that of publication; awards are given in the following year. Winning titles are listed first, with other nominees listed below. Year Winner Other nominees 1965 The Doors of His… …   Wikipedia

  • Orion Nebula — The entire Orion Nebula in visible light. Credit: NASA/ESA Observation data: J2000 epoch …   Wikipedia

  • African American literature — ▪ literature Introduction       body of literature written by Americans of African descent. Beginning in the pre Revolutionary War period, African American writers have engaged in a creative, if often contentious, dialogue with American letters.… …   Universalium

  • List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

  • History of the Earth — For the history of modern humans, see History of the world. Geological time put in a diagram called a geological clock, showing the relative lengths of the eons of the Earth s history The history of the Earth describes the most important events… …   Wikipedia

  • William Gibson — Infobox Writer name = William Gibson imagesize = 300px caption = William Gibson in August 2007 birthdate = birth date and age|mf=yes|1948|3|17 birthplace = Conway, South Carolina occupation = Novelist citizenship = United States, Canada period =… …   Wikipedia

  • Mega Man Battle Network 5 — North American Mega Man Battle Network 5: Double Team DS box art Developer(s) Capcom Production Studio 2 Publisher(s) …   Wikipedia

  • Serpent Mound — This article is about the site in the USA. For the one in the UK, see Skelmorlie. Serpent Mound U.S. National Register of Historic Places …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”