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Maps: NASA Blue Marble, Black Marble, LRO, MESSENGER, Cassini, New Horizons · Mars: NASA/JPL/USGS Viking mosaic, relief from MGS MOLA (NASA/GSFC, 6x vertical exaggeration) · Jupiter: Hubble OPAL 2019, NASA, ESA, A. Simon (GSFC), M.H. Wong (UC Berkeley) (CC BY 4.0), enhanced colour · Sun's limb: NASA/SDO AIA 304 Å · Sun, Saturn, Saturn's rings, Uranus, Neptune, clouds, relief: Solar System Scope (CC BY 4.0) · Moons and small worlds: NASA/JPL/USGS; Io, Ganymede, Titan, Triton via CelestiaContent (CC BY, Askaniy Anpilogov et al.); Mimas, Tethys, Dione, Rhea, Ceres, Vesta via Stellarium (CC BY 4.0, Oleg Pluton, FarGetaNik) · Bennu, Ryugu, Itokawa, Eros, Arrokoth: shape models NASA PDS / OSIRIS-REx / NEAR / New Horizons (CC0), Ryugu ISAS/JAXA (CC BY 4.0); maps via CelestiaContent (Askaniy Anpilogov, Roman Tkachenko; Stooke, NASA PDS; CC BY) · Orbits: JPL, Minor Planet Center; asteroids and comets: NASA/JPL Small-Body Database (via KStars) · Spacecraft trajectories: NASA/JPL Horizons · Rotation: IAU WGCCRE · Data: NASA NSSDC
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The night sky in September 2027

What happens in the sky in September 2027, worked out from orbital data. Open the calendar to see each event in 3D. Times in UTC.

5 sky events this month
  • 15 Wed Full Moon · around 10:46 PM
    The Moon is opposite the Sun, so its whole face is lit. It rises around sunset and is up all night.
  • 23 Thu September equinox · around 05:56 AM
    The Sun crosses the celestial equator heading south. Day and night are close to equal everywhere; autumn begins in the northern hemisphere, spring in the southern.
  • 24 Fri Mercury at greatest eastern elongation: best after sunset
    Mercury is as far from the Sun in our sky as it gets this time, 26°. Look low in the west soon after sunset.
  • 28 Tue The Moon passes Jupiter, about 3.8° apart · around 12:33 PM
    The Moon moves about its own width across the stars every hour, so it passes each planet about once a month. The gap is as seen from Earth's centre; from where you stand it can differ by up to a degree. In the east before sunrise.
  • 30 Thu New Moon · around 02:45 AM
    The Moon is on the Sun's side of the sky and can't be seen. The nights around it are the darkest of the month, the best for the Milky Way and faint meteors.