Our Planets & Solar System


Venus Earth’s mysterious twin planet

Venus, the second planet from the Sun, is often referred to as Earth’s “sister planet” due to its similar size, mass, and composition. However, its extreme conditions and unique features make it a fascinating and enigmatic celestial object. This essay explores some exciting facts about Venus.

Venus is the hottest planet in our solar system, with surface temperatures reaching a blistering 870 degrees Fahrenheit (465 degrees Celsius). That’s hot enough to melt lead!

Venus’s Atmosphere and Surface
Venus has a thick atmosphere composed mainly of carbon dioxide (96.5%) and nitrogen (3.5%), with trace amounts of other gases. The atmosphere contains thick clouds of sulfuric acid, making the planet’s surface invisible from space. Venus’s surface pressure is 92 times that of Earth, which is comparable to the pressure nearly a kilometer (0.62 miles) below Earth’s ocean surface.

The surface of Venus is characterized by volcanic plains, mountains, and vast rift valleys. Due to the planet’s dense atmosphere, surface temperatures can reach a scorching 465°C (870°F), making it the hottest planet in our solar system, even though it is not the closest to the Sun.

Venus’s Unusual Rotation
Unlike most planets in our solar system, Venus rotates on its axis in a retrograde (clockwise) direction. This means that if you were standing on Venus, you would see the Sun rise in the west and set in the east. Additionally, Venus has the slowest rotation of any planet, taking 243 Earth days to complete one rotation. Interestingly, its orbit around the Sun is faster than its rotation, resulting in a Venusian day (sunrise to sunrise) that lasts 117 Earth days.

The Greenhouse Effect on Venus
The extreme heat on Venus’s surface is due to a runaway greenhouse effect. The planet’s thick atmosphere traps solar radiation, causing temperatures to soar. This intense greenhouse effect makes Venus an important case study for understanding the potential consequences of uncontrolled greenhouse gas emissions on Earth, offering insights into the importance of mitigating human-induced climate change.

Surface Temperature

465°C (870°F)

Miles from Earth

25 million

1 Day on Earth

58 days

Weight compared to 1 Earth


Exploration of Venus
Venus has been the target of numerous space missions, primarily from the United States and the Soviet Union. The Soviet Venera program, which lasted from 1961 to 1984, was the first to achieve a soft landing on Venus (Venera 7) and transmit images of the surface (Venera 9 and 10). More recently, missions like ESA’s Venus Express and NASA’s Magellan have provided valuable data on Venus’s atmosphere, surface, and geological processes.

Venus’s Mysterious “Super-Rotation”
One of the most intriguing aspects of Venus’s atmosphere is its “super-rotation,” where the upper layers of the atmosphere travel at speeds of up to 60 times faster than the planet’s rotation. This phenomenon remains one of the biggest puzzles in planetary science, and scientists continue to study it to gain a better understanding of Venus’s atmospheric dynamics and the forces driving this high-speed rotation.

Venus is a captivating and mysterious planet with unique characteristics that set it apart from Earth, despite their similar size and composition. The study of Venus deepens our understanding of planetary processes and provides valuable insights into the challenges and consequences of climate change on Earth.

More interesting facts about the planets

  • Why is Venus the hottest planet?
    You might think that the planet closest to the Sun would be the hottest, right? But that’s not the case. The hottest planet in our solar system is actually Venus, which is second from the Sun. Why, you ask? Well, it’s all because of its super thick atmosphere and something called the greenhouse effect. Acid … continue reading.
  • Why is Venus Earth’s sister planet?
    Venus is often referred to as Earth’s “sister planet” due to their similar size, composition, and proximity to the Sun. Both planets have nearly the same diameter and mass, and they’re made up of similar rocky materials. Venus and Earth also have substantial atmospheres, though Venus’ is far denser and hotter. However, the similarities largely … continue reading.
  • Why does planet Venus spin backwards?
    If you are wondering why our neighboring planet Venus spins backwards this quick guide will provide more insight. While other planets follow the cosmic dance of rotating in the same direction as they orbit the Sun, Venus dares to be different. It’s a planetary rebel, rotating in the opposite direction, and scientists are still unraveling … continue reading.