Scale and Compass Image for Crab Nebula
Crab Nebula, M1, NGC 1952
6,500 light-years (2,000 parsecs)
Data were provided by the HST proposals 9787 and 10526: J. Hester and J. Foy (ASU), and J. Morse (RPI); and proposal 13109: M. Weisskopf, A. Tennant, and C. Wilson-Hodge (NASA/MSFC), J. Arons (UC Berkeley), R. Blandford, R. Buehler, S. Funk, and Y. Uchiyama (Stanford University), P. Caraveo, A. De Luca, and M. Tavani (INAF), E. Costa (CNR), C. Ferrigno (Integral Science Data Center, Switzerland), D. Horns (DESY, Germany), A. Lobanov (Max Planck Institute for Radio Astronomy, Germany), E. Max (Lawrence Livermore National Laboratory), and R. Mignani (University College London).
F550M (V) and F606W (V) + POLV60
This image is a composite of separate exposures acquired by the ACS/WFC instrument. Several filters were used to sample various wavelengths. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors represent not only changes in different filters, but also the same filters taken on different exposure dates to highlight features that change over time.