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Mercury May 3 2010
Description
Mercury is the closest planet to the Sun and the smallest in the solar system, with a diameter only slightly larger than that of the Moon. Due to its proximity to the Sun and the lack of a significant atmosphere to retain heat, the planet experiences extreme temperature fluctuations between day and night. The planet's surface is scarred by numerous craters, giving it an appearance strikingly similar to that of the Moon.
Original title
כוכב חמה (3 במאי 2010)
כוכב חמה הוא כוכב הלכת הקרוב ביותר לשמש והקטן ביותר במערכת השמש, וקוטרו גדול רק במעט מזה של הירח. בשל קרבתו לשמש והיעדר אטמוספירה משמעותית שתאגור חום, שוררים על פניו הפרשי טמפרטורות קיצוניים בין היום ללילה. פני השטח של כוכב הלכת מצולקים במכתשים רבים, המקנים לו מראה המזכיר את פני הירח.
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