The real Planck cosmic microwave background, as seen from your sky.
Location
Latitude °N
Longitude °E
Time
Entered in your browser's local time zone.
Cosmic microwave background
Contrast (± range)
Brightness
ΔT (µK)
Sky layers
Star size
Grids & horizon
All-sky map
Click or drag on the map to look there. The box shows your current field of view; the curve is your horizon.
Controls
Drag — look around · Wheel / pinch — zoom Arrow keys — pan (Shift = faster) · + / − zoom N E S W — face that direction · Z — zenith · X — nadir Space — pause time · H — hide panel
About the data
CMB: ESA/Planck Collaboration, 2018 release (PR3). SMICA nosz component-separated temperature map (inpainted column, in µKCMB), and the 143 GHz (HFI) and 30 GHz (LFI) frequency maps, resampled from HEALPix (Nside 2048/1024) to galactic equirectangular textures. The monopole (2.7255 K) and the dipole are not shown; the colours are the tiny ±100 µK anisotropies. Raw frequency maps are shown on an arcsinh scale so the Milky Way does not wash out the CMB.
Stars & constellations: Hipparcos-based catalogue and IAU constellation lines from d3-celestial (BSD-3, O. Frohn). Positions are J2000, precessed to the date shown; no nutation, aberration or atmospheric refraction.
NESW↑ Zenith↓ NadirHorizonWideMap
WebGL 2 is required
Please use a recent version of Chrome, Edge, Firefox or Safari.