Galaxy

The Triangulum Galaxy

Also M33 · NGC 598

A spiral galaxy in the Local Group, the third largest after Andromeda and the Milky Way.

Measured

2.58 million light-years. To cross it:

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

Under very dark skies it is at the limit of naked-eye visibility.
Published distances to it run from about 730 to 960 kpc. Here it stands 790.5 kpc from the Sun, placed by McConnachie et al. 2005 (809 kpc, with Andromeda at 785 kpc in the same table), so it and Andromeda keep their measured places against each other.
It holds NGC 604, one of the largest star-forming regions known, about 1,300 light years across (NASA, 2024).

Every catalogue Ouranos draws is credited on the credits page.

Galaxy

Also M33 · NGC 598

A spiral galaxy in the Local Group, the third largest after Andromeda and the Milky Way.

2.58 million light-years. To cross it:

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

Under very dark skies it is at the limit of naked-eye visibility.
Published distances to it run from about 730 to 960 kpc. Here it stands 790.5 kpc from the Sun, placed by McConnachie et al. 2005 (809 kpc, with Andromeda at 785 kpc in the same table), so it and Andromeda keep their measured places against each other.
It holds NGC 604, one of the largest star-forming regions known, about 1,300 light years across (NASA, 2024).

Every catalogue Ouranos draws is credited on the credits page.