First cophasing of a segmented mirror with a tunable filter and the pyramid wavefront sensor

First Data From the Helioseismic and Magnetic Imager

First diffraction limited images at VLT with NAOS and CONICA

First experiences with ARNICA, the ARCETRI observatory imaging camera

First Experimental Demonstration of Noise Cancellation for LISA Interferometry

First Flight Design Microshutter Arrays for JWST NIRSpec.

First Gaia Photometry

First Inner Solar System Results From The Pan-STARRS 1 Telescope

First LEO Satellite Constellation Based on GPS

First light at the HAWC high altitude TeV gamma ray detector in Mexico

First light from a very large area pixel array for high-throughput x-ray polarimetry

First light from the Vela pulsar with the Fermi Gamma-ray Space Telescope

First light observations with SCUBA-2

First light observations with TIFR near-infrared camera.

First light with ISO and its instruments

First Light with NEWFIRM: Initial Performance and Science Verification Projects

First limits to the neutral IGM during cosmic reionization using the Hydrogen 2p-2s transition in absorption

First manufactured diamond AGPM vector vortex for the L- and N-bands: metrology and expected performances

First measurements of water vapor and ozone with TEA CO2 lasers to test lidar station

First multispacecraft ion measurements in and near the Earth's magnetosphere with the identical Cluster ion spectrometry (CIS) experiment