• Cmdr_Hadfield/Twitter
    1 of 10

    Commander of the International Space Station Chris Hadfield tweeted this photo on Feb. 26, and wrote, "Tonight's Finale: Lake Baikal, Siberia. Immensely old and deep, it holds one-fifth of all the Earth's fresh water. pic.twitter.com/VvPAyT6Hl4"

  • NASA Solar Dynamics Observatory
    2 of 10

    On Feb. 20, in just 14 hours, two active regions on the sun popped off numerous relatively minor flares (seen as bright flashes), while a pair of filaments above the sun's edge sent elongated steams of plasma back and forth. According to NASA, the filaments are suspended by magnetic forces. This image was taken in extreme ultraviolet light.

  • AP Photo/Muhammed Muheisen
    3 of 10

    An Afghan refugee holds an umbrella as he wades through flooded water from heavy rain on the outskirts of Islamabad, Pakistan, Wednesday.

  • NASA Earth Observatory
    4 of 10

    In February 2013, a nor’easter pounded the eastern U.S., resulting in extreme beach erosion along the coast of Massachusetts and other coastal areas. On Feb. 10, just hours after the storm moved out to sea, NASA's Terra satellite captured this image. Plumes of tan and milky sediment swirl in the waters off of Cape Cod and the east coast of Massachusetts. According to news reports, many beaches on the Cape and the South Shore of Massachusetts lost 15 to 20 feet of beach to erosion by the sea. Public officials claim that many beaches have lost more sand in the past year than in the previous ten.

  • Michael Dodge/Getty Images
    5 of 10

    A Royal Australian Air Force F/A-18 Hornet takes on fuel from a KC-30A Multi Role Tanker Transport aircraft during the Australian Defence Force Air-To-Air refuelling on Feb. 27 in Melbourne, Australia.

  • NASA Earth Observatory
    6 of 10

    Saharan dust blew over the Mediterranean Sea in late February. NASA's Aqua satellite took this picture on Feb. 22 and the Earth Observatory released the image on Feb. 25. An especially thick river of dust stretched northward past the Greek island of Kriti (Crete).

  • Peter Macdiarmid/Getty Images
    7 of 10

    Crowds fill St Peter's Square as Pope Benedict XVI attends his last public audience on Feb. 27 in Vatican City, Vatican.

  • AP Photo/Charles Rex Arbogast
    8 of 10

    Stacy Crain and Al Giannini, both from Rockford, Ill., walk under Anish Kapoor's stainless steel Cloud Gate sculpture in Chicago's Millennium Park, as a winter storm of rain and snow begins Feb. 26.

  • NASA Earth Observatory
    9 of 10

    Following on the heels of another storm, heavy snow fell on Colorado and neighboring states on Feb. 24. NASA's Terra satellite acquired this image the next day. In the wake of the storms, snow extended across Colorado and Wyoming, and covered parts of Utah, New Mexico, and Nebraska.

  • AP Photo/Matthias Schrader
    10 of 10
    Next: Yesterday's 10 Must-See Photos

    Dawid Kubacki of Poland soars through the air during the Nordic Ski World Championships in Val di Fiemme, Italy, Feb. 27.