Latest News
Image Gallery
Our Operations
Comets & Asteriods
Arp Galaxies
Messier Objects
Moon & Planets
Northern Caldwell Objects
Southern Caldwell Objects
NGC Objects
Objects With Common Names
Photographic Messier Marathon Album

Friday June 7, 2013


Annular Eclipse of the Sun from Page, AZ.
3towers Lunar 100
3towers Moon Halos
3towers All Sky Cam



3towers Observatory Latest Images:


Comet C/2011 L4 (PANSTARRS) March 12, 2013
Comet Panstaars


Planets in the western sky after sunset May 29, 2013 and May 30, 2013, respectively

Mercury, Venus, and Jupiter in the western sky 29 May 2013


Mercury, Venus, and Jupiter in the western sky May 30, 2013

C-11 HyperStar and Canon 60Da images




C-11 HyperStar and Starlight Xpress SXVR-H9C

Comet Linear bw Comet Linear Color Flame Nebular Horsehead Nebula
Comet C /2011 F1 (Linear) Comet C/ 2011 F1 (Linear) Flame Nebula (NGC2024) Horsehead Nebula (IC434)
IC404 Comet Garradd M104 M105
IC405 (Flaming Star Nebula; Caldwell31) Comet C/2009 P1 Garradd M104 M105
M27 M35 M36 M37
M27 M35 M36 M37
M3 M41 M44 M46
M3 M41 M44 M46
M47 M48 M4: C-11 HyperStar M50 C-11 HyperStar
M47 M48 M4 M50
M67 C11 HyperStar M77 C-11 Hyper Star M78 C-11 HyperStar M68 C-11 HyperStar
M67 M77 M78 M68


New Essays:

Revised essay:  Is the Hubble Space Telescope Still Doing Good Science?
Astrophotography with the Nikon D100
Color Magnitude Diagram of M67
Space Quarantine
Olbers' Paradox



New Grasslands Observatory Deep-Sky Images


DoubleCluster NGC6969   IC1848 NGC7000
Double Cluster (NGC869/884; Caldwell14) NGC6960 (Part of Veil Nebula)   IC1848 (Soul Nebula; Sharpless 2-199; LBN 667) NGC7000 (North America Nebula; Caldwell20)
Pelican Nebula Arp70   Arp78 NGC2359 and Shadow Drone
Pelican Nebula (IC5070, IC5067) Arp70 (UGC934)   Arp78 (NGC772/770) NGC2359 and RQ-7 Shadow Drone!
Arp154 Arp213   Arp336  
Arp154 Arp213 (IC356)   Arp336 (NGC2685)