This Wide Field Image of Tycho's Supernova Remnant is a color composite of Mid-Infrared by Spitzer Space Telescope (red), and X-ray (blue: high-energy X-ray, green: middle energy, yellow: low-energy) by Chandra X-Ray Observatory on Near-Infrared by Calar Alto 3.5m Telescope. The remnant is approximately 25 ly in diameter.
