Home > Terms > English, UK (UE) > 4-kpc arm

4-kpc arm

A component of the Sagittarius arm with noncircular gas motions.

0
Improve it
More
Collect to Blossary

Other Languages:

More

Member comments

You have to log in to post to discussions.

Related terms

3-kpc arm
Astronomy; General astronomy

A component of the Sagittarius arm with noncircular gas motions. It is seen in absorption against Sgr A with a velocity of -53 km s-1, implying that at least part of the arm is ...

arm
Fire safety; Prevention & protection

That sequence of control system functions for the establishing of a source of ignition that must be complete and verified immediately before the firing of the flame effect.

arm
Language; Slang

1. British power, influence, coercion. A colloquial coinage on the lines of ‘hold’, ‘grip’ or ‘strong-arm’. This should give us some arm. 2. See on the arm 3. South ...

arm
Animals; Dogs

The anatomical region between the shoulder and the elbow. Sometimes called the upper arm.

arm
Health care; AIDS prevention & treatment

Any of the treatment groups in a clinical trial.

astronomical unit (AU)
Astronomy; General astronomy

Approximately equal to the mean earth-sun distance, which is about 150,000,000 km or 93,000,000 miles. Formally, the AU is actually slightly less than the earth's mean distance ...

celestial coordinates
Astronomy; General astronomy

Any system for locating the positions of objects on the celestial sphere. Various systems are defined, according to the chosen point of observation (the origin) and the plane of ...

distance modulus
Astronomy; General astronomy

The difference between the apparent magnitude of an object, m, corrected for *interstellar absorption, and its absolute magnitude, M. This difference is directly linked to the ...

luminosity class
Astronomy; General astronomy

A classification of stars according to their luminosity, which can vary widely for a given *spectral type. Luminosity class indicates, for example, whether a star is a supergiant, ...

asteroid
Astronomy; General astronomy

Any of the many small rocky or metallic objects in the Solar System, mostly lying in a zone (the asteroid belt) between the orbits of Mars and Jupiter; also known as a minor ...

elliptical galaxy
Astronomy; General astronomy

A type of galaxy with a smooth, featureless circular or elliptical appearance, no spiral arms, and little or no interstellar gas or dust; symbol E. Elliptical galaxies range from ...

Terms in the News

Featured Terms

Harry8L
  • 0

    Terms

  • 0

    Blossaries

  • 1

    Followers

Industry/Domain: Sports Category: Swimming

Swimmer body shaving

The removal of hairs as well as the thin layer of dead skin cells that coat the outer layer of the epidermis to make a swimmer's body more aerodynamic ...

Contributor

Featured blossaries

Top Ski Areas in the United States

Category: Geography   2 9 Terms

Engineering

Category: Engineering   1 2 Terms

Browers Terms By Category

TERMS

SOCIAL

EXTRAS

SOLUTIONS