Seeing double

Approximately 95 million light-years away, in the southern constellation of Octans (The Octant), lies NGC 7098 — an intriguing spiral galaxy with numerous sets of double features. The first of NGC 7098’s double features is a duo of distinct ring-like structures that loop around the galaxy’s hazy heart. These are NGC 7098’s spiral arms, which have wound themselves around the galaxy’s luminous core. This central region hosts a second double feature: a double bar.

NGC 7098 has also developed features known as ansae, visible as small, bright streaks at each end of the central region. Ansae are visible areas of overdensity — they commonly take looping, linear, or circular shapes, and can be found at the extremities of planetary ring systems, in nebulous clouds, and, as is the case with NGC 7098, in parts of galaxies that are packed to the brim with stars.

This image is formed from data gathered by the FOcal Reducer and low dispersion Spectrograph (FORS) instrument, installed on ESO’s Very Large Telescope at Paranal Observatory. An array of distant galaxies are also visible throughout the frame, the most prominent being the small, edge-on, spiral galaxy visible to the left of NGC 7098, known as PGC 246235.

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ESO

Om bilden

ID:potw1730a
Typ:Observation
Publiceringsdatum:24 juli 2017 06:00
Storlek:3435 x 3538 px

Om objektet

Namn:NGC 7098
Typ:Local Universe : Galaxy : Type : Spiral
Constellation:Octans
Kategori:Galaxies

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26,3 MB
Stor jpeg
4,9 MB
Skärmstor jpeg
316,6 kB

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Koordinater

Position (RA):21 44 17.11
Position (Dec):-75° 6' 40.13"
Field of view:7.21 x 7.43 arcminutes
Orientering:Nord är -0.0° vänster om lodrätt

Färger och filter

BandVåglängdTeleskop
Synligt ljus
b
440 nmVery Large Telescope
FORS2
Synligt ljus
v
557 nmVery Large Telescope
FORS2
Synligt ljus
H-Alpha
660 nmVery Large Telescope
FORS2
Synligt ljus
R
655 nmVery Large Telescope
FORS2