Which is the smallest planet

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which is the smallest planet

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Which is the smallest planet?

Answer: The smallest planet in our solar system is Mercury. Here are some key details about Mercury that highlight why it holds this title:

1. Size and Diameter

Mercury has a diameter of about 4,880 kilometers (3,032 miles). This makes it significantly smaller than other planets in our solar system. In fact, it is only a little larger than Earth’s Moon.

2. Comparative Size

To put Mercury’s size in perspective, it is about:

  • 1.4 times larger than the Moon.
  • 38% of Earth’s diameter.

3. Surface Area

Mercury’s surface area is roughly 74.8 million square kilometers, which is less than 15% of Earth’s surface area.

4. Volume and Mass

  • Volume: Mercury’s volume is about 6.083×10^10 cubic kilometers, which is only about 5.6% of Earth’s volume.
  • Mass: Mercury has a mass of approximately 3.30×10^23 kilograms, which is around 5.5% of Earth’s mass.

5. Density and Composition

Despite its small size, Mercury is quite dense, with a density of 5.427 grams per cubic centimeter. This high density is due to its large iron core, which makes up about 42% of its volume.

6. Orbital Characteristics

Mercury is the innermost planet in the solar system, orbiting the Sun at an average distance of about 57.9 million kilometers (36 million miles). Its proximity to the Sun means it has a very short orbital period, completing a revolution around the Sun in just 88 Earth days.

7. Surface and Temperature

Mercury’s surface resembles that of the Moon, covered with craters and lacking any significant atmosphere to retain heat. As a result, it experiences extreme temperatures, ranging from about -173°C (-280°F) at night to 427°C (800°F) during the day.

Conclusion

Mercury’s title as the smallest planet in our solar system is based on its diameter, volume, and mass. Despite its modest size, it plays a critical role in our understanding of planetary science and the formation of the solar system.

Interactive Visualization

For a more interactive experience, consider using planetary visualization tools available online, where you can compare the sizes and other characteristics of celestial bodies.

If you have any other questions about the planets or the solar system, feel free to ask!

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