Radio Galaxy Zoo Talk


  • carolynjoy by carolynjoy

    The IR looks like it has the jets on it. Anyone know why there is that large streak? Thanks.


  • firejuggler by firejuggler

    the large streakis most likelly something produced by a nearby star.


  • DocR by DocR scientist

    unfortunate situation with WISE, SDSS shows two nearby stars and the likely real identification.


  • JeanTate by JeanTate in response to carolynjoy's comment.

    In many, perhaps most, cases the 'streaks' are diffraction spikes, a well-known kind of artifact caused by light from a nearby very bright star (it has to do with the 'vanes' or 'spider' which holds the secondary mirror in the telescope in place).

    While the diffraction spikes in this SDSS image are quite different from those in the WISE (IR) image - they're different telescopes! - you can see that there are four bright stars nearby (this SDSS image is zoomed out):

    enter image description here