Planck first light yields promising results
Thursday, September 17, 2009 - 05:28
in Astronomy & Space
Planck, ESA's mission to study the early Universe, started surveying the sky regularly from its vantage point at the second Lagrange point of the Sun-Earth system, L2, on 13 August. The instruments were fine-tuned for optimum performance in the period preceding this date. In preparation for routine scientific operations, their long-term stability was verified by conducting a first trial survey.