Spiral Arm

Spiral Arm

 

a structural formation characteristic of spiral galaxies.

References in periodicals archive ?
The photo shows the singular major spiral arm in the galaxy, scientists don't quite know what to make of it because more spiral galaxies usually have two arms.
The technique, which is called 'trigonometric parallax', was then applied to measure the distance between Earth and a star in the Scutum-Centaurus spiral arm - a length of about 66,000 light-years.
Rather than being stuck in a backwater galactic community, our solar system sits along a major spiral arm of the Milky Way, researchers say September 28 in Science Advances.
The Sun is located in the Orion spiral arm, about 30,000 light years from the galactic centre.
They identified the pattern of stars towards the center of the photo as our galaxy's Milky Way, while the dark patches are the dense dust clouds in an inner spiral arm of our galaxy.
Mel Hughes, prosecuting, said the infant suffered a spiral arm fracture during an incident on November 3, 2014.
Since the luminosities of these stars are well known, the newly discovered ones could be shown to lie at a distance appropriate to an outer spiral arm.
If the sky is very dark and transparent, a 4-inch scope at 50x can show a band of faint fuzz beyond this dark lane--the next spiral arm outward.
Scientists captured images just 11 hours after the explosion in an outer spiral arm of the Pinwheel Galaxy, in the Great Bear constellation.
I suspect this is because the spiral arm on the west is in the foreground, whereas the eastern arm is receding behind the galaxy's famously dense dust lanes.
These nearby stars are within the same galactic spiral arm as the Sun.
TEHRAN (FNA)- Astronomers discovered a magnetic field coiled around the galaxy's main spiral arm by making a detailed, multi-telescope study of a nearby galaxy.