Leader Board
These are the potential ad sizes for placement. We use bootstrap, and the three columns will stack as page width diminishes.
Mobile Leaderboard Portrait
Large Rectangle
Medium Rectangle
Half Page
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Background Photo Credit: T.A.Rector (University of Alaska Anchorage, NRAO/AUI/NSF and NOAO/AURA/NSF) and B.A.Wolpa (NOAO/AURA/NSF)