Andromeda
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Galaxy

Messier 100

Also M100 · NGC 4321

Open in OuranosCompare its size

A grand-design spiral galaxy in the Virgo Cluster, one of the brighter galaxies in it.

Measured

Distance
45.4 million light-years
Size
about 100,000 light-years across (approximate)
Constellation
Coma Berenices
Position (J2000)
RA 12h 22m 55s, Dec +15.82°

How far, from the Sun

45.4 million light-years. To cross it:

  • Light45.4 million years
  • Voyager 1's speed807 billion years
  • Driving at 100 km/h490 trillion years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Facts

  • Hubble's measurements of its Cepheid stars in the 1990s helped pin down the expansion rate of the Universe.
  • It is moving away from us at about 1,570 km/s (NASA/IPAC NED).

Where this comes from

  • Cosmicflows-3, Tully, Courtois & Sorce 2016, AJ 152, 50 (13.93 Mpc)
  • This research has made use of the SIMBAD database, CDS, Strasbourg, France (Wenger et al. 2000, A&AS 143, 9).
  • This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France (DOI: 10.26093/cds/vizier).

Every catalogue Ouranos draws is credited on the credits page.