Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Download
Faster access than browser!
 

Sh2-155

+ Save concept

Sh2-155 (also designated Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. [1]

22 relations: Astronomy Picture of the Day, Caldwell catalogue, Cambridge University Press, Cepheus (constellation), Chandra X-ray Observatory, Declination, Epoch (astronomy), H II region, Ionization, Lynds' Catalogue of Bright Nebulae, Molecular cloud, Nebula, O-type star, Patrick Moore, Right ascension, Sharpless catalog, SIMBAD, Spitzer Space Telescope, Star formation, Stellar kinematics, The Astrophysical Journal, Young stellar object.

Astronomy Picture of the Day

Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU).

New!!: Sh2-155 and Astronomy Picture of the Day · See more »

Caldwell catalogue

The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.

New!!: Sh2-155 and Caldwell catalogue · See more »

Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

New!!: Sh2-155 and Cambridge University Press · See more »

Cepheus (constellation)

Cepheus is a constellation in the northern sky, which is named after Cepheus (a King in the Greek mythology).

New!!: Sh2-155 and Cepheus (constellation) · See more »

Chandra X-ray Observatory

The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a Flagship-class space observatory launched on STS-93 by NASA on July 23, 1999.

New!!: Sh2-155 and Chandra X-ray Observatory · See more »

Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

New!!: Sh2-155 and Christmas · See more »

Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

New!!: Sh2-155 and Christmas and holiday season · See more »

Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

New!!: Sh2-155 and Christmas Eve · See more »

Christmas traditions

Christmas traditions vary from country to country.

New!!: Sh2-155 and Christmas traditions · See more »

Declination

In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.

New!!: Sh2-155 and Declination · See more »

Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

New!!: Sh2-155 and Epoch (astronomy) · See more »

H II region

An H II region or HII region is a region of interstellar atomic hydrogen that is ionized.

New!!: Sh2-155 and H II region · See more »

Ionization

Ionization or ionisation, is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.

New!!: Sh2-155 and Ionization · See more »

Lynds' Catalogue of Bright Nebulae

Lynds' Catalogue of Bright Nebulae is an astronomical catalogue of bright nebulae.

New!!: Sh2-155 and Lynds' Catalogue of Bright Nebulae · See more »

Molecular cloud

A molecular cloud, sometimes called a stellar nursery (if star formation is occurring within), is a type of interstellar cloud, the density and size of which permit the formation of molecules, most commonly molecular hydrogen (H2).

New!!: Sh2-155 and Molecular cloud · See more »

Nebula

A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

New!!: Sh2-155 and Nebula · See more »

New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

New!!: Sh2-155 and New Year · See more »

New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

New!!: Sh2-155 and New Year's Day · See more »

New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

New!!: Sh2-155 and New Year's Eve · See more »

O-type star

An O-type star is a hot, blue-white star of spectral type O in the Yerkes classification system employed by astronomers.

New!!: Sh2-155 and O-type star · See more »

Patrick Moore

Sir Patrick Alfred Caldwell-Moore (4 March 19239 December 2012) was an English amateur astronomer who attained prominent status in that field as a writer, researcher, radio commentator and television presenter.

New!!: Sh2-155 and Patrick Moore · See more »

Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.

New!!: Sh2-155 and Right ascension · See more »

Sharpless catalog

The Sharpless catalog is a list of 313 HII regions (emission nebulae), intended to be comprehensive north of declination −27°.

New!!: Sh2-155 and Sharpless catalog · See more »

SIMBAD

SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System.

New!!: Sh2-155 and SIMBAD · See more »

Spitzer Space Telescope

The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space telescope launched in 2003 and still operating as of 2018.

New!!: Sh2-155 and Spitzer Space Telescope · See more »

Star formation

Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars.

New!!: Sh2-155 and Star formation · See more »

Stellar kinematics

In astronomy, stellar kinematics is the observational study or measurement of the kinematics or motions of stars through space.

New!!: Sh2-155 and Stellar kinematics · See more »

The Astrophysical Journal

The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.

New!!: Sh2-155 and The Astrophysical Journal · See more »

Young stellar object

Young stellar object (YSO) denotes a star in its early stage of evolution.

New!!: Sh2-155 and Young stellar object · See more »

2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

New!!: Sh2-155 and 2018 · See more »

2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

New!!: Sh2-155 and 2019 · See more »

Redirects here:

Caldwell 9, Cave Nebula, S 155, Sharpless 155, Sharpless 2-155.

References

[1] https://en.wikipedia.org/wiki/Sh2-155

OutgoingIncoming
Hey! We are on Facebook now! »