Astronomy Picture of the Day
    


APOD: 2023 July 12 Rings and Bar of Spiral Galaxy NGC 1398
<< Yesterday 11.07.2023 Tomorrow >>
APOD: 2023 July 12  Rings and Bar of Spiral Galaxy NGC 1398
Credit & Copyright: Mark Hanson; Data: Mike Selby
Explanation: Why do some spiral galaxies have a ring around the center? Spiral galaxy NGC 1398 not only has a ring of pearly stars, gas and dust around its center, but a bar of stars and gas across its center, and spiral arms that appear like ribbons farther out. The featured deep image from Observatorio El Sauce in Chile shows the grand spiral galaxy in impressive detail. NGC 1398 lies about 65 million light years distant, meaning the light we see today left this galaxy when dinosaurs were disappearing from the Earth. The photogenic galaxy is visible with a small telescope toward the constellation of the Furnace (Fornax). The ring near the center is likely an expanding density wave of star formation, caused either by a gravitational encounter with another galaxy, or by the galaxy's own gravitational asymmetries.

January
February
March
April
May
June
July
August
September
October
November
December
 < July 2023  >
Mo Tu We Th Fr Sa Su





12
3456789
10111213141516
17181920212223
24252627282930
31





Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: spiral galaxy
Publications with words: spiral galaxy
See also:
All publications on this topic >>