What's up in
Universe
Astronomy, cosmology, stars, planets, black holes and the observatories revealing how the cosmos works.
Hubble sights galaxy's celestial sequins
Evidence suggests key assumption in discovery of dark energy is in error
Cosmic bubbles reveal the first stars
Astronomers find wandering massive black holes in dwarf galaxies
New rules illuminate how objects absorb and emit light
Space-time metasurface makes light reflect only in one direction
Life may have first emerged in phosphorous-rich lakes
Counting photons is now routine enough to need standards
Electronics at the speed of light
Tweezer clock may help tell time more precisely
