
8 Modern Astronomy Mysteries Scientists Still Can’t Explain
Image: This artist’s impression shows galaxies at a time less than a billion years after the Big Bang, when the universe was still partially filled with hydrogen fog that absorbed ultraviolet light. Credit: ESO/M. Kornmesser
The vastness of space and the puzzling nature of the cosmic objects that occupy it provides no shortage of material for astronomers to ponder.
To round up some of the most enduring mysteries in the field of astronomy, the journal Science enlisted help from science writers and members of the Board of Reviewing Editors to choose eight puzzling questions being asked by leading astronomers today.

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