One of the so-called California hard-edged painters, along with her husband Lorser Feitelson, Helen Lundeberg (1908-99) made coolly expressive, enigmatic and in the end highly geometric paintings, bridging the Surrealists of the 1930s and 40s and the Minimalists of the 70s and 80s. This exhibition shows one of her abiding interests throughout the decades was astronomy, reflecting the way that the discovery of new galaxies, the space race and the moon landing captured the 20th-century imagination...