M51

Astronomers speculate that M51's spiral structure is primarily due to its gravitational interaction with a neighboring smaller galaxy.

Explanation: One of the brightest supernovas in recent years has just been recorded in the nearby Whirlpool galaxy (M51).

Perhaps the original spiral nebula, M51 is also known as the Whirlpool Galaxy.

Perhaps the original spiral nebula, M51 is a large galaxy, over 60, 000 light-years across, with a readily apparent spiral structure.

Through guiding bed, lithology and electric properties analysis, strata of M51-4 sub member was compared.

This gravitational tug of war may also have triggered an increased level of star formation in M51 .

This paper evaluates and predicts the advantage area to M51-2 reservoir based on the reservoir development factors.

This dramatically processed color composite combines M51 image data from the Calar Alto Observatory's 1. 2 meter telescope.

Over 60, 000light-years across, M51's spiral arms and dust lanes clearly sweep infront of its companion galaxy, NGC 5195.

Over 60, 000 light-years across, M51's spiral arms and dust lanes clearly sweep in front of its companion galaxy, NGC 5195.

Located 15 million light-yearsaway in the constellation Hydra, M83 is two times closer to Earth than M51.

The M51 has a range of 9, 000 kilometers, half again more than the M45 weapon it replaces.