This is NGC 3621, a galaxy located far outside our "neighborhood" of galaxies, some 22,000,000 lightyears away. The blueish haze that surrounds the galaxy is the furthest outskirts of the galaxy in which millions of stars exist. To travel across NGC 3621 from end to end would take nearly 100,000 lightyears. The brighter stars in the picture that seem to be closer are stars located in our own Milky Way Galaxy, and the stars that seem further away (circled in red) are not stars at all - some are galaxies even more distant than NGC 3621.
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