how big is mars represents a topic that has garnered significant attention and interest. | Size, Compared to Earth, Mass, Gravity, & Facts .... Mars is a small planet, larger than only Mercury and slightly more than half the size of Earth. Its equatorial radius measures 3,396 kilometers (2,110 miles), with a mean polar radius of 3,379 kilometers (2,100 miles). Mars: Facts - NASA Science.
With a radius of 2,106 miles (3,390 kilometers), Mars is about half the size of Earth. If Earth were the size of a nickel, Mars would be about as big as a raspberry. From an average distance of 142 million miles (228 million kilometers), Mars is 1.5 astronomical units away from the Sun. Mars is the fourth planet from the Sun.
It is also known as the " Red Planet ", for its orange-red appearance. In relation to this, [22][23] Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide (CO2). Equally important, at the average surface level the atmospheric pressure is a few thousandths of Earth 's, atmospheric temperature ranges from −153 to 20 °C (−243 to 68 °F), [24] and ...

| Size of Planet Mars - Space.com. Mars is about half (53 percent) the size of Earth, but because Mars is a desert planet, it has the same amount of dry land as Earth. Mars Facts - Fourth Planet From the Sun - Science Notes and Projects. Mars is approximately half the size of Earth, with a diameter of 6,779 km (4,212 mi) compared to Earth’s 12,742 km (7,918 mi).
Another key aspect involves, its surface area is about 28% that of Earth. However, since Mars lacks oceans, the surface area is roughly the same as the combined land area of Earth’s continents. Mars Statistics By Size, Missions and Facts (2025) - Sci-Tech Today. It's important to note that, mars has a diameter (distance from the middle) of almost 6.791 kilometers, and it is roughly 50% of the Earth’s size.

Mars is more likely to be struck by asteroid belt debris and short-period... Another key aspect involves, | Scale of the Universe. Mars is not the largest planet in our solar system, but it's not the smallest either. Mars has a radius of 3,389.5 kilometers, or 2,106 miles.
To give you a better idea, that's about half the size of Earth! Mars Size - Dimensions Guide. Mars Size In terms of equatorial radius, the size of Mars is 3,396.2 km, or nearly half the Earth.

The polar radius is 3,376.2 km. The total surface area is 144,798,500 km2. Is Mars Bigger Than the Earth? With a radius of about 2,106 miles1, Mars is roughly half the size of Earth.

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