Early morning lake fog

Early morning lake fog.

Early morning lake fog.

The old Ionospheric Prediction Service solar observatory in Australia. This facility was shared with CSIRO.

Diagram of the effects of a solar flare.

Diagram of the effects of a solar flare.

A huge solar flare on the bottom left of the photograph.

John Bortniak monitoring solar activity at the Mauna Loa Observatory.

Construction of the new Ionospheric Service Solar Observatory at Culgoora.

8 Balonne Street, Narrabri. Home for the U.S. solar observer while in Australia .

The coronagraph at the Mauna Loa Observatory.

Climber on the Flatirons silhouetted against a setting sun.

Plate I of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate II of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate III of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate III of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate V of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate VI of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate VII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate VIII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate IX of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate X of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XI of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XIII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XIV of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XV of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XVI of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XVII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XVIII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XIX of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XX of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XXI of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Plate XXII of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 565 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 759 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 785 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 814 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 815 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 869 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 872 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Image 890 of "Studies among the Snow Crystals ... " by Wilson Bentley, "The Snowflake Man." From Annual Summary of the "Monthly Weather Review" for 1902. Bentley was a bachelor farmer whose hobby was photographing snow flakes.

Series of wave clouds over Washington, D.C. taken from the Weather Bureau Building at 24th and M Streets NW. In: "Monthly Weather Review", July 1962, p. 271.

Ice crystals of unusual size. This crystal was 4 and 3/4 inches in diameter. In: "Monthly Weather Review," March 1936, p. 83.

Snow garland caused by combination of wet snow and little wind. In: "Monthly Weather Review," November 1935, p. 315.

Snow garland caused by combination of wet snow and little wind.

Snow crystals as observed and drawn by William Scoresby. In: "An account of the Arctic regions with a history and description of the northern whale-fishery", by W. Scoresby. 1820. P. 588, Vol. II. Plate VIII. Library Call Number G742 .S42 1820 .

Snow crystals as observed and drawn by William Scoresby. In: "An account of the Arctic regions with a history and description of the northern whale-fishery", by W. Scoresby. 1820. P. 588, Vol. II. Plate IX. Library Call Number G742 .S42 1820 .

Snow crystals as observed and drawn by William Scoresby. In: "An account of the Arctic regions with a history and description of the northern whale-fishery", by W. Scoresby. 1820. P. 588, Vol. II. Plate X. Library Call Number G742 .S42 1820 .

Snow crystals as observed and drawn by William Scoresby. In: "An account of the Arctic regions with a history and description of the northern whale-fishery", by W. Scoresby. 1820. P. 588, Vol. II. Plate XI. Library Call Number G742 .S42 1820 .