NASA. LARGE FORMAT. The Milky Way galaxy modeled by NASA scientists. Not counting transient events such as gamma-ray bursts, the brightest object in the gamma-ray sky is the plane of our Milky Way galaxy. This glow results from a vast sea of cosmic-ray particles colliding with interstellar gas and dust, generating gamma rays. To study our galaxy, theorists create models of how these different particles interact with magnetic fields at different locations and with different strengths. Astronomers can then compare these models with actual observations made at radio, infrared, optical, ultraviolet and X-ray wavelengths to see how closely they match the data. 2017. Vintage chromogenic print. Numbering on front. Label legend on back. 40.6 x 40.6CM with margins.

Composed of several subsidiaries, the Drouot Group is a major player in the art market. Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852. 15 salerooms are available to more than 70 auction houses. The emulation generated by an annual offer of 230,000 artworks from 21 major specialities - from Antiquity to street art - attracts some 3,000 visitors every day. The Group's digital platform, Drouot.com, offers digital sales - Live auctions (live broadcasting and participation in auctions), Online-only auctions (dematerialised auctions) and Buy Now sales (sales of lots at fixed prices). Nearly 2 million items are offered annually by 600 auction houses. Auction news is reported every week in La Gazette Drouot, the leading weekly magazine for the art market and culture published by Auctionspress.