... M61: Virgo Spiral Galaxy . ... Visible in M61 are a host of features common to spiral galaxies: bright spiral arms, a central bar, dust lanes, and bright knots of stars. ... Prominent features include a small open cluster of stars, a diffuse red-glowing emission nebula, large lanes of obscuring gas and dust, and dense knots of dust and gas in which stars may still be forming. ... This image was made when the spacecraft approached to within 18 miles of Deimos' surface. ... Dust Hip Deep on Phobos . ...