© Mary Evans Picture Library / Bill Coster / ardea.com / picture alliance

© International Centre for Radio Astronomy Research (ICRAR)

© Sean Pavone / Getty Images / iStock

© Ralf Nau / Getty Images / The Image Bank

© NASA / Spacelab-1 on orbit

© NASA Earth Observatory, Joshua Stevens and Jeff Schmaltz / Gains at Hofsjökull Ice Cap

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© Chris Putnam / Zoonar / picture alliance

© Amalia Villafañe

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© Science Credit: NASA, ESA, K. Todorov and K. Luman, Penn State University; Artwork Credit: Gemini Observatory, Lynette Cook / Binary System 2M J044144 (Artist’s Concept)

© Sebastien Bozon / Getty Images / AFP

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© Sandwish / Getty Images / iStock

© Philip Dulian / picture alliance/ dpa

© Julien Benoit, University of the Witwatersrand

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© delihayat / Getty Images / iStock

© NASA / art002e009288

© Tedi Vick / An artist rendering of the system. (IMAGE)