The constellation X-ray mission

The Constellation-X mission is a large collecting area X-ray facility, emphasizing observations at high spectral resolution $(E/ΔE∼300–3000)$ while covering a broad energy band (0.25–40 keV). This mission will achieve a factor of 100 increased sensitivity over current capabilities and is optimized to observe the effects of extreme gravity close to black holes, and test models for the formation of large scale structure in the Universe. It is apart of NASA’s strategic plan for launch towards the end of the first decade of the 21st century.