NGC1356, IC1947 - HST - Potw2352a
ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey/DOE/FNAL/NOIRLab/NSF/AURA
Acknowledgement: L. Shatz, CC BY 4.0Credit:
ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey/DOE/FNAL/NOIRLab/NSF/AURA
Acknowledgement: L. ShatzThis Hubble Picture of the Week features a richness of spiral galaxies: the large, prominent spiral galaxy on the right side of the image is NGC 1356; the two apparently smaller spiral galaxies flanking it are LEDA 467699 (above it) and LEDA 95415 (very close at its left) respectively; and finally, IC 1947 sits along the left side of the image.
ThIs image is a really interesting example of how challenging it can be to tell whether two galaxies are actually close together, or just seem to be from our perspective here on Earth. A quick glance at this image would likely lead you to think that NGC 1356, LEDA 467699 and LEDA 95415 were all close companions, whilst IC 1947 was more remote. However, we have to remember that two-dimensional images such as this one only give an indication of angular separation: that is, how objects are spread across the sphere of the night sky. What they cannot represent is the distance objects are from Earth.
For instance, whilst NGC 1356 and LEDA 95415 appear to be so close that they must surely be interacting, the former is about 550 million light-years from Earth and the latter is roughly 840 million light-years away, so there is nearly a whopping 300 million light-year separation between them. That also means that LEDA 95415 is likely nowhere near as much smaller than NGC 1356 as it appears to be.
On the other hand, whilst NGC 1356 and IC 1947 seem to be separated by a relative gulf in this image, IC 1947 is only about 500 million light-years from Earth. The angular distance apparent between them in this image only works out to less than four hundred thousand light-years, so they are actually much much closer neighbours in three-dimensional space than NGC 1356 and LEDA 95415!
[Image Description: A collection of galaxies. On the left side a large spiral galaxy with swirling, twisted arms is flanked by a smaller, but still detailed, spiral behind its arm on the left, and a smaller spiral above it. On the right side is a fourth, round spiral galaxy seen face-on. Between them lies a single bright star. Several stars and distant galaxies dot the background.]
Credit:
ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey/DOE/FNAL/NOIRLab/NSF/AURA
Acknowledgement: L. Shatz
Coordinates Position (RA): 3 30 36.99 Position (Dec): -50° 19' 7.14" Field of view: 3.35 x 3.09 arcminutes Orientation: North is 115.5° right of vertical
Colours & filters Band Wavelength Telescope Optical g 474 nm Víctor M. Blanco 4-meter Telescope DECam Optical r 644 nm Víctor M. Blanco 4-meter Telescope DECam Optical z 919 nm Víctor M. Blanco 4-meter Telescope DECam Optical V 606 nm Hubble Space Telescope ACS.
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
|
ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey/DOE/FNAL/NOIRLab/NSF/AURA
Acknowledgement: L. Shatz- Dieses Werk darf von dir
- verbreitet werden – vervielfältigt, verbreitet und öffentlich zugänglich gemacht werden
- neu zusammengestellt werden – abgewandelt und bearbeitet werden
- Zu den folgenden Bedingungen:
- Namensnennung – Du musst angemessene Urheber- und Rechteangaben machen, einen Link zur Lizenz beifügen und angeben, ob Änderungen vorgenommen wurden. Diese Angaben dürfen in jeder angemessenen Art und Weise gemacht werden, allerdings nicht so, dass der Eindruck entsteht, der Lizenzgeber unterstütze gerade dich oder deine Nutzung besonders.
Relevante Artikel
NGC 1356NGC 1356 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBbc im Sternbild Horologium am Südsternhimmel. Sie ist schätzungsweise 520 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 260.000 Lj. Im selben Himmelsareal befinden sich die Galaxien IC 1947, IC 1950, IC 1959, IC 1968. .. weiterlesen
IC 1947IC 1947 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBc im Sternbild Horologium am Südsternhimmel. Sie ist schätzungsweise 509 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 70.000 Lj. .. weiterlesen