We briefly discuss some of the currently unanswered problems in solar astronomy which lend themselves to investigations particularly in the Extreme Ultra Violet (EUV) region of the spectrum. In this context, need of high spatial, spectral and temporal resolution is emphasized for such studies. Finally, after a brief discussion of the EUV instrumentation, a high resolution stigmatic EUV spectroheliometer is described which is currently under development for high resolution studies of the solar chromosphere, transition region and corona. The spectroheliometer will be flown aboard a sounding rocket.