OCTOBER
1999Browse every NASA Astronomy Picture of the Day entry published in October 1999.
26M83: A Barred Spiral Galaxy
27Our Galaxy in Stars, Gas, and Dust
28Mystery Object Explained
29The Crab Nebula in X-Rays
30Massive Stars Of 30 Doradus
01New Stars In 30 Doradus
02Phi Persei: Double Star
03Nearby Dwarf Galaxy Leo I
04The 220 Mirrors of CRTF
05Two Hours Before Neptune
06Polaris: The North Star
07The Averted Side Of The Moon
08NGC 1365: Barred Spiral Galaxy
09The Frothy Milky Way
10Triton: Neptune's Largest Moon
11Eta Carinae in X-Rays
12NGC 2346: A Butterfly-Shaped Planetary Nebula
13Ozone Hole Reduced
14Moon Over Eugenia
15Moon Crashers
16Maria Mitchell Inspires a Generation
17Black Holes in Galactic Centers
18NGC 3603: An Active Star Cluster
19Earth's North Magnetic Pole
20NGC 2261: Hubble's Variable Nebula
21Follow The Spots
22Iridium 52: Not A Meteor
23M27: Not A Comet
24The Magnetic Carpet Of The Sun
25Neptune in Infrared
2630 Doradus: The Tarantula Nebula
27In the Heart of the Tarantula Nebula
28X-Ray Jet From Centaurus A
29The USNO Millennium Time Ball
30Mars Rocks, Sojourner Rolls
31The Cat's Eye Nebula
01The Rotten Egg Planetary Nebula
02Aurora Through a Moonlit Sky
03M32: Blue Stars in an Elliptical Galaxy
04Gamma-Ray Bursting
05The Shadow Of Phobos
06X-ray Transit of Mercury