(C) NASA
This story was originally published by NASA and is unaltered.
 . . . . . . . . . .



Hubble Examines a Barred Spiral’s Light [1]

[]

Date: 2024-06 

Astronomers use filters extensively in their observations. These filters may allow either extremely narrow or somewhat broader ranges of light through to the telescope’s instruments. Narrow-band filters are invaluable from a scientific perspective because they filter specific wavelengths of light that are associated with specific physical and chemical processes. For example, under certain conditions, hydrogen atoms emit red light with a wavelength value of 656.46 nanometers called H-alpha emission, or the ‘H-alpha line’. It is very useful to astronomers because its presence indicates certain physical processes and conditions and is often a tell-tale sign of newly forming stars.

[END]
---
[1] Url: https://science.nasa.gov/missions/hubble/hubble-examines-a-barred-spirals-light/

Published and (C) by NASA
Content appears here under this condition or license: Public Domain.

via Magical.Fish Gopher News Feeds:
gopher://magical.fish/1/feeds/news/nasa/