2006/4/9 Aurora from Madison
2006/3/14 Penumbral lunar eclipse
2006/2/24 Madison WI dark sky map
2006/2/18 Nova RS Ophiuchi
2005/10/14 China's Shenzhou 6 spacecraft
2005/8/12 aurora over Goose Bay, Canada
2005/7/12 circumhorizon arc
2005/7/3 International space station in telescope
2005/6/27 Venus and Mercury close encounter
2005/6/14 rainbow: secondary, supernumerary, polarization
2005/5/27 a red rainbow
2005/5/24 rainbow
2005/5/11 new moon
2005/3/13 Sundog
2005/3/4 Cloud irisation
2005/2/25 Sun pillars
2005/2/7 Star Trails from the City
2005/1/27 Perseus Double cluster, Comet Machholz, Kemble's Cascade
2005/1/14 Comet C/2004 Q2 Machholz
2004/12/24 Subsun and mysterious arc
2004/12/7 Rainbow
2004/12/7 Supernumerary bow
2004/12/5 Frost
2004/11/23 Cloud irisation
2004/11/23 Lower Tangent Arc
2004/11/23 Subparhelion
2004/11/23 Subsun
2004/11/9 Aurora again!
2004/11/9 Moon occults Jupiter, daytime
2004/11/7 Aurora
2004/11/4 Mount St. Helens volcano webcam
2004/10/27 Total lunar eclipse
2004/10/27 A CD spectrometer
2004/10/16 Hail
2004/10/8 Spider web rainbow
2004/9/18 Pittsburgh flood
2004/9/16 Add Google search to all webpages
2004/9/3 Rain curtain
2004/9/3 Pileus cloud
2004/8/19 Lightning
2004/7/28 Pittsburgh dark sky map
2004/7/20 big sunspots
2004/6/19 sundog
2004/6/14 Mammatus clouds
2004/6/12 Circumzenith arc and bird
2004/6/8 Venus Transit
2004/6/2 Blue sky rainbow
2004/6/2 Supernumerary arcs in rainbow
2004/6/2 Rainbow: primary and secondary
2004/5/29 Circumhorizon arc
2004/5/23 Precipitation curtain
2004/5/23 Pileus cloud
2004/5/17 Comet C/2001 Q4 NEAT
2004/4/27 Comet C/2004 F4 Bradfield
2004/4/17 Lightning
2004/3/28 Triple shadow on Jupiter
2004/3/22 Venus, the Moon and Mercury
2004/3/22 The Moon and Mercury
2004/3/13 Subsun over Atlantic ocean
2004/1/11 Distorted sun and plane
2004/1/3 Homemade Nikon coolpix cable release
2003/12/21 Distorted sun
2003/12/20 Sun pillar
2003/12/13 2003 Geminids meteor shower
2003/11/20 Pittsburgh aurora again!
2003/11/9 Moondog
2003/11/8 Total lunar eclipse
2003/11/7 Circumzenith arc
2003/11/7 Sundog
2003/11/7 Aphelion vs. Perihelion
2003/10/30 Pittsburgh Aurora
2003/10/30 Sunspots
2003/10/13 Mt. Washington (NH) shadow
2003/10/13 Mt. Washington (NH) sundog
2003/9/28 Sunset rainbow
2003/9/27 M57
2003/9/17 Barnard's star
2003/9/7 Mars rotation in 4 hours
2003/9/7 Mars, the Moon, and a moondog
2003/9/7 Upper tangent arc, 22 degree halo, and a sundog
2003/9/4 Mars
2003/8/28 Mars
2003/8/27 Mars
2003/8/19 Mars
2003/8/15 Mars
2003/8/6 Chinese version of this website is up
2003/8/2 Mars
2003/8/2 Confluence of two rivers
2003/8/2 Crepuscular rays
2003/7/30 ISS transits the Sun
2003/7/17 Mars and the Moon
2003/7/13 Mars
2003/7/6 Circumzenith arc
2003/6/29 Rainbow
2003/6/24 Mars
2003/6/22 Mars
2003/6/20 Rainbow (primary)
2003/6/20 Rainbow (secondary)
2003/6/17 Kennedy Space Center tour, 2000 (in Chinese)
2003/6/12 Funnel clouds (tornado!)
2003/6/9 My homemade solar filters
2003/6/9 Sunspots 375, 380
2003/5/24 Sundog at sunset
2003/5/22 Quasar 3C273
2003/5/19 Sundog at sunset
2003/5/19 Circumzenith arc
2003/5/14 Geyser rainbow
2003/5/7 Mercury transits the Sun
2003/5/4 Morning rainbow
2003/4/27 3D image: Jupiter near M44
2003/4/26 Io shadow on Jupiter
2003/4/26 Okean O Rocket in Leo
2003/4/26 Iridium flare in Bootes
2003/4/14 Mercury
2003/4/14 Saturn
2003/4/13 Jet contrail
2003/4/13 Sunset and a bit of green flash
2003/4/12 Mercury
2003/4/12 Saturn
2003/4/12 Sundog cloud
2003/4/12 Crepuscular rays
2003/4/1 Lenticular cloud
2003/3/28 Vesta movie
2003/3/26 Jupiter near M44
2003/3/23 The asteroid Vesta
2003/3/19 22 degree halo and sundog
2003/3/19 Upper tangent arc
2003/3/14 Jupiter
2003/3/14 Saturn
2003/3/7 Sundog
2003/2/27 Glory
2003/2/27 Jetliner shadow in water
2003/2/27 Bottle-bow
2003/2/25 Irisation
2003/2/24 Subparhelia
2003/2/23 Lower tangent arc with subsun
2003/2/22 Subsun
2003/2/21 Parhelic circle
2003/2/12 Moon corona
2003/2/12 C/2002 V1 NEAT photo
2003/2/11 C/2002 V1 NEAT
2003/2/10 CMU remembers Columbia
2003/2/5 C/2002 V1 NEAT sketch
2003/2/4 M78
2003/2/4 M45
2003/2/4 Double cluster in Perseus
2003/2/3 M31
2003/2/3 M42
2003/2/1 Wagman observatory in winter
2003/2/1 Squashed sun
2003/1/31 C/2002 V1 NEAT photos
2003/1/26 Snowflakes
2003/1/23 22 degree halo around the sun
2003/1/23 Snow sparkles
2003/1/19 Jet contrail shadow
2003/1/19 Snowflake sparkles
2003/1/17 Sun pillar
2003/1/12 Comet C/2002 X5 Kudo-Fujikawa
2003/1/12 Comet C/2002 V1 NEAT
2003/1/8 Comet C/2002 V1 NEAT
2003/1/7 Snowflakes
2002/12/21 M1, M42, M57 photos
2002/12/11 Sundog
2002/12/10 Green fireball
2002/12/3 Shuttle Endeavour and ISS
2002/11/21 Saturn's moons
2002/11/19 Uranus
2002/11/19 Leonids 2002
2002/11/18 Moon halo
2002/10/13 Circumzenith arc
2002/9/28 ISS and Progress M1-9
2002/9/28 Birds watching sunset
2002/9/28 Venus
2002/9/23 Nova Sagittarii 2002 No. 3
2002/9/7 Lightning
2002/9/1 Earth shadow from air
2002/9/1 Polarizer window
2002/9/1 Rainbow. Cooper Landing, Alaska
2002/9/1 Rainbow over Resurrection bay, Seward, Alaska
2002/9/1 Rainbow from Harding ice field trail, Alaska
2002/9/1 22 degree halo in Denali national park
2002/8/30 Airline Aurora