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The Crab Pulsar
Credit: International Gemini Observatory/NOIRLab/NSF/AUR, Jen Miller, Travis Rector, Mahdi Zamani & Davide de Martin License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
The Happy Face of Gravitational Lensing
Credit: NASA/ESA License: Public Domain icons -
Close-up view of a sunspot
Credit: NSO/NSF/AURA License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
Halley's Comet
Credit: ESO License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
Apparatus for determining the gravitional constant
Credit: Henry Cavendish in Philosophical Transactions of the Royal Society, DOI: 10.1098/rstl.1798.0022 License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
H-alpha image of the Sun's chromosphere
Credit: Big Bear Solar Observatory (BBSO)/New Jersey Institut of Technology (NJIT) License: Public Domain icons -
Jet Ejected from the Active Galaxy M87
Credit: NASA, ESA, A. Lessing (Stanford University), E. Baltz (Stanford University), M. Shara (AMNH), J. DePasquale (STScI) License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
Electric Field
Credit: wikicommons user Geek3 License: Creative Commons Attribution-ShareAlike 3.0 Unported icons -
The Prime Meridian
Credit: Wikicommons user Kmf164 License: Public Domain icons -
Remnant of SN 1006
Credit: X-ray: NASA/CXC/Rutgers/G.Cassam-Chenai, Hughes et al.; Radio: NRAO/AUI/NSF/GBT/VLA/Dyer, Maddalena & Cornwell; Optical: Middlebury College/F.Winkler, NOAO/AURA/NSF/CTIO Schmidt & DSS License: Public Domain icons -
Infrared Reentry Analysis: Shuttle Orbiter Columbia
Credit: NASA with minor adjustments by wikicommons user Ke4roh License: Public Domain icons -
The red supergiant Betelgeuse
Credit: ALMA (ESO/NAOJ/NRAO)/E. O’Gorman/P. Kervella License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
Pioneer Plaques
Credit: NASA Ames License: Public Domain icons -
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Arecibo Message
Credit: Arne Nordmann (wikicommons user norro) License: Creative Commons Attribution-ShareAlike 3.0 Unported icons -
Mare Crisium - Sea of Crises
Credit: NASA, Lunar Reconnaissance Orbiter License: Public Domain icons -
Moon and Earth's thin atmosphere
Credit: Earth Science and Remote Sensing Unit, NASA Johnson Space Center License: Public Domain icons -
The planet PDS 70b inside a protoplanetary disk
Credit: ESO/ A. Müller, MPIA License: Creative Commons Attribution 4.0 International (CC BY 4.0) icons -
Herschel’s view of new stars and molecular clouds
Credit: ESA/Herschel/NASA/JPL-Caltech; acknowledgement: R. Hurt (JPL-Caltech) License: Creative Commons Attribution 3.0 IGO icons -
Venus Transit from Tempe, AZ, USA , June 5, 2012
Credit: Stephen Rector License: Creative Commons Attribution-ShareAlike 3.0 Unported icons
