The Atacama Large Millimetre/submillimetre Array (ALMA) has been used to detect the most distant clouds of star-forming gas yet found in normal galaxies in the early universe. The new observations allow astronomers to start to see how the first galaxies were built up and how they cleared the cosmic fog during the era of reionisation.
Not all galaxies are neatly shaped, as this new NASA/ESA Hubble Space Telescope image of NGC 6240 clearly demonstrates. Hubble previously released an image of this galaxy in 2008, but the knotted region was only revealed in these new observations from Hubble’s Wide Field Camera 3 and Advanced Camera for Surveys.
One of the great challenges in astrophysics is the detection of low-frequency gravitational waves — elusive ripples in the fabric of space-time caused by extremely energetic and large-scale cosmic events. To this end, the National Science Foundation (NSF) has awarded the North American Nanohertz Observatory for Gravitational Waves $14.5 million over 5 years.