I do like the pairing of NGC3576 and NGC3603, a mixture of sprinkling stardust and two contrasting nebulae within our Galaxy. The NGC3576 complex on the right is relatively nearby, 6,000 light-years away and relatively small. Its pinkish colour is emission from hydrogen gas. NGC3603 is much larger and much further away. The cluster at the centre of NGC3603 is one of the most massive in the Milky Way, containing truly massive stars. One is nearly 3 million times more luminous than the Sun, and 132 times the mass. NGC3603 is reddened by intervening dust, hinting that it is much further away, it's some 22,500 light-years distant.
Larger view of the pair here
100% view of NGC3603
100% view of NGC3576
Larger view of the full frame
One of my longer exposure projects and I'm fairly happy with it - 45 x 5 minutes (3hr 35min), ISO800, EOS 60D, darks, flats and bias subtracted. 200mm f/5 Newtonian on HEQ5 pro mount, OAG & StarShoot Autoguider. Stacked and processed in PixInsight and Photoshop.