Understanding the Universe
21.02.2011
Since time immemorial, we have sought clues from the stars as to the past history, present state and future evolution of the Universe. Almost all of our astronomical observations rely on the detection of electromagnetic radiation from planets, stars, galaxies, etc, and for most of astronomical history, we believed these measurements provided a reliable census of the contents of the Universe. But now we know differently: now we know that most of the Universe consists of matter (Dark Matter) and energy (Dark Energy) that we cannot see at all, and whose very nature provides one of the greatest challenges to modern astrophysics.
21.02.2011
Since time immemorial, we have sought clues from the stars as to the past history, present state and future evolution of the Universe. Almost all of our astronomical observations rely on the detection of electromagnetic radiation from planets, stars, galaxies, etc, and for most of astronomical history, we believed these measurements provided a reliable census of the contents of the Universe. But now we know differently: now we know that most of the Universe consists of matter (Dark Matter) and energy (Dark Energy) that we cannot see at all, and whose very nature provides one of the greatest challenges to modern astrophysics.