Open clusters generally survive for a few hundred million years.

Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.

Open clusters are key objects in the study of stellar evolution.

Open clusters range from very sparse clusters with only a few members to large agglomerations containing thousands of stars.

Open clusters are often classified according to a scheme developed by Robert Trumpler in 1930.

Open clusters are strongly concentrated close to the galactic plane, with a scale height in our galaxy of about 180 light years, compared to a galactic radius of approximately 100, 000 light years.

Open clusters are not seen in elliptical galaxies: star formation ceased many millions of years ago in ellipticals, and so the open clusters which were originally present have long since dispersed.

Open clusters are a crucial step in this sequence.

Open clusters are also easily detected in many of the galaxies of the Local Group.

* Open and globular clusters overview

Category: Open clusters

Open clusters become disrupted over time by the gravitational influence of giant molecular clouds as they move through the galaxy, but cluster members will continue to move in broadly the same direction through space even though they are no longer gravitationally bound ; they are then known as a stellar association, sometimes also referred to as a moving group.

Open clusters usually contain up to a few hundred members, within a region up to about 30 light-years across.

Open clusters are often dominated by hot young blue stars, because although such stars are short-lived in stellar terms, only lasting a few tens of millions of years, open clusters tend to have dispersed before these stars die.

* Open clusters

Category: Open clusters

Category: Open clusters

Category: Open clusters

Open clusters of 8 to 10 small cylinder shaped rayless yellow flower heads ¼ to ½ inch ( 6 to 13 mm ) with a highly conspicuous ring of black tipped bracts at the base of the inflorescence as is characteristic of many members of the genus Senecio.

Category: Open clusters

" There are also some Arminians, like Roger Olson, who believe Open theism to be an alternative view that a Christian can have.

It is one of four commercial operating systems that are presently certified to The Open Group's UNIX 03 standard.

Since then groups that are not affiliated to the Santo Daime have used ayahuasca, and a number of different ' styles ' have been developed, such as the non-religious approach developed by Daniel Waterman in 2001, popularly termed Ayahuasca Open Style ( AOS ).

In early 2007 Borland rolled out a new company tagline, branding and go to market focus around Open Application Lifecycle Management ( ALM ) – defining it as the segment of the ALM market in which vendors ' solutions are flexible enough to support a customer's specific processes, tools and platforms.

There are a few alternatives for " Legacy BIOS " in the x86 world: Extensible Firmware Interface, Open Firmware ( used on the OLPC XO-1 ), and coreboot.

Free and open source software libraries have been created to support such features in a portable way, and are most notably found in the repositories of the Common-Lisp. net and Common Lisp Open Code Collection projects.

The divisions used by the USASF / IASF are currently Tiny, Mini, Youth, Junior, Junior International, Junior Coed, Senior, Senior Coed, Special Needs, and Open International.

Near the bridge on the Peninsula are Menlo Park's Bayfront Park, East Palo Alto's Ravenswood Open Space Preserve, and the Palo Alto Baylands Nature Preserve.

They are typically the employees of a DBMS vendor ( e. g., Oracle, IBM, Microsoft, Sybase ), or, in the case of Open source DBMSs ( e. g., MySQL ), volunteers or people supported by interested companies and organizations.

Both the database and most of its DBMS reside remotely, " in the cloud ," while its applications are both developed by programmers and later maintained and utilized by ( application's ) end-users through a web browser and Open APIs.

Germany's FernUniversität in Hagen followed in 1974 and there are now many similar institutions around the world, often with the name Open University ( in English or in the local language ).

Open learning system often includes aspects of e-learning. There are numerous universities and organizations that create open educational resources for self-motivated students to access anywhere, at any time.

A translator generates C source code and the GCC and Open Watcom compilers are supported.

The four main components of the Federal Reserve System are ( 1 ) the Board of Governors, ( 2 ) the Federal Open Market Committee, ( 3 ) the twelve regional Federal Reserve Banks, and ( 4 ) the member banks throughout the country.

Contravariant functors on Open ( X ) are called presheaves on X.

The most recent champions of the prestigious Czech Open are Sweden's IBK Dalen.

All caches published on opencaching. com are available under an Open Source license.

Open standards are less strictly defined, but by some definitions the term describes technical standards without legal restrictions.

Open categories such as nouns and verbs have highly active generation mechanisms and their lexemes are more semantic in nature.

The University of Illinois / NCSA Open Source License combines text from both the MIT and BSD licenses ; the license grant and disclaimer are taken from the MIT License.

Open ocean aquaculture ( OOA ) uses cages, nets, or long-line arrays that are moored, towed or float freely.

Open ocean habitats are found in the deep ocean beyond the edge of the continental shelf

Passengers without a valid ticket boarding a train at a station where ticket-buying facilities are available are required to pay the full Open Single or Return fare.

Open textbooks help to eliminate this problem, because they are online and thus easily updatable.