MSGID: 1:153/757.0 a06b5b17   
   TZUTC: -0800   
   CHRS: LATIN-1 2   
                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                  2025 January 7   
       A star field appears above a town at night. The left part of the sky   
      shows a pinkish-red glow that is an aurora, while the right part of the   
      sky shows a smoother and darker glow that is a SAR arc. Please see the   
                    explanation for more detailed information.   
      
                          A New Year's Aurora and SAR Arc   
                     Image Credit & Copyright: Alessandra Masi   
      
      Explanation: It was a new year, and the sky was doubly red. The new   
      year meant that the Earth had returned to its usual place in its orbit   
      on January 1, a place a few days before its closest approach to the   
      Sun. The first of the two red skyglows, on the left, was a red aurora,   
      complete with vertical rays, caused by a blast from the Sun pushing   
      charged particles into Earth's atmosphere. The second red glow, most   
      prominent on the far right, was possibly a SAR arc caused by a river of   
      charged particles flowing across Earth's atmosphere. Although both   
      appear red, the slight color difference is likely due to the aurora   
      being emitted by both oxygen and nitrogen, whereas the higher SAR arc   
      was possibly emitted more purely by atmospheric oxygen. The featured   
      image was taken on January 1 from near Pieve di Cadore in Italy.   
      
                      Portal Universe: Random APOD Generator   
                      Tomorrow's picture: supernovas (plural)   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
                     NASA Web Privacy, Accessibility, Notices;   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
   --- BBBS/Li6 v4.10 Toy-7   
    * Origin: The Rusty MailBox - Penticton, BC Canada (1:153/757)   
   SEEN-BY: 4/0 19/10 88/0 90/0 105/81 106/201 128/187 129/305 134/100   
   SEEN-BY: 153/135 143 148 151 757 6809 7083 7715 218/700 840 221/1   
   SEEN-BY: 221/6 360 226/30 227/114 229/110 114 206 307 317 400 426   
   SEEN-BY: 229/428 470 664 700 705 266/512 282/1038 291/111 301/1 320/219   
   SEEN-BY: 322/757 335/364 341/66 200 342/200 396/45 460/58 633/280   
   SEEN-BY: 712/848 880/1 900/0 102 106 902/0 6 19 26 905/0 930/1 5019/40   
   SEEN-BY: 5020/400 5075/35   
   PATH: 153/757 221/6 341/66 902/26 229/426