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                           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 June 22   
       The image looks down on an orange rock on Mars. On the rock are many   
        nearly spherical smaller rocks. Please see the explanation for more   
                               detailed information.   
      
                         A Berry Bowl of Martian Spherules   
                     Image Credit: NASA, JPL, Curiosity Rover   
      
      Explanation: How were these unusual Martian spherules created?   
      Thousands of unusual gray spherules made of iron and rock and dubbed   
      blueberries were found embedded in and surrounding rocks near the   
      landing site of the robot Opportunity rover on Mars in 2004. To help   
      investigate their origin, Opportunity found a surface dubbed the Berry   
      Bowl with an indentation that was rich in the Martian orbs. The Berry   
      Bowl is pictured here, imaged during rover's 48th Martian day. The   
      average size of a Martian blueberry rock is only about 4 millimeters   
      across. By analyzing a circular patch in the rock surface to the left   
      of the densest patch of spherules, Opportunity obtained data showing   
      that the underlying rock has a much different composition than the   
      hematite rich blueberries. This information contributes to the growing   
      consensus that these small, strange, gray orbs were slowly deposited   
      from a bath of dirty water.   
      
       APOD Turns 30!: Free Public Lecture in Cork, Ireland on Tuesday, June   
                                    24 at 7 pm   
                          Tomorrow's picture: heart stars   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
   --- BBBS/Li6 v4.10 Toy-7   
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