Pakistan Affairs Test 139

✅ Mercury – Key Facts for Competitive Exams 

📌 Basic Information :

• ✅ Smallest planet in the Solar System 🌍
• ✅ Closest planet to the Sun ☀️
• ✅ No moons or rings 🌑
• ✅ Surface: Rocky and cratered (like the Moon)
• ✅ Atmosphere: Very thin (almost none)
• ✅ Temperature: Extremely hot during the day, freezing at night
• ✅ Rotation period: 59 Earth days
• ✅ Revolution period (around Sun): 88 Earth days .

   Several planets are visible from Earth with the naked eye (without a telescope). These are often called the "naked-eye planets."

    Planets Visible from Earth:

1. Mercury – Visible near the horizon just before sunrise or after sunset.
2. Venus – The brightest planet, often called the Morning Star or Evening Star.
3. Mars – Recognizable by its reddish color.
4. Jupiter – Very bright; often the second brightest planet after Venus.
5. Saturn – Visible as a bright object; its rings need a telescope to see.

     Key Points for Exams

• Total Naked-eye Planets: 5 (Mercury, Venus, Mars, Jupiter, Saturn).
• Brightest Planet in the Sky: Venus.
• Red Planet: Mars.
• Largest Planet: Jupiter.

     Trick (Mnemonic) to Remember:

     "My Very Merry Jungle Safari"

• M → Mercury
• V → Venus
• M → Mars
• J → Jupiter
• S → Saturn

    Extra Tip for MCQs

• Brightest → Venus
• Reddish → Mars
• Biggest → Jupiter
• Rings → Saturn
• Closest to Sun → Mercury