"Earth's twin" typically refers to Venus, often called Earth's "sister planet" or "evil twin," because it's very similar in size, mass, density, and composition, but its runaway greenhouse effect makes it a scorching hot, hellish world with crushing pressure and sulfuric acid clouds, unlike Earth's life-sustaining environment.
Venus is the second planet from the Sun, and our closest planetary neighbor. It's the hottest planet in our solar system, and is sometimes called Earth's twin.
Venus is called Earth's twin because Venus and Earth are almost the same size, have a very similar composition, and approximately have about the same mass.
Instead, ultra-precise isotopic analysis of iron and other elements shows Theia formed right here in the inner Solar System — even slightly closer to the Sun than Earth itself. It was literally Earth's sibling planet, growing up in the same stellar nursery before a catastrophic collision merged their fates forever.
If you were asked which two planets were the twins of our Solar System, you'd probably pick Uranus and Neptune — two mysterious, blue ice giants in neighboring orbits around the Sun. But there's another contending pair: Venus and Earth.
Why are Venus and Mars called Earth's sister planets? Venus and Mars are considered Earth's sisters because they are similar in structure and composition, but they differ drastically in atmospheric conditions and surface environments.
The planet that experiences 42 years of darkness (and 42 years of light) at its poles is Uranus, due to its extreme axial tilt of about 98 degrees, making it "roll" on its side as it orbits the Sun. This unique tilt causes each pole to face the Sun continuously for 42 Earth years, followed by 42 years in darkness, while the equator experiences more typical day-night cycles.
No, The Planets Don't Have a Gender: What Venus and Mars Are Really About. “Venus is the type of woman a man is attracted to, and Mars is the type of man a woman is attracted to.”
While we don't see any double planets in our solar system today, the dwarf planet Pluto is only ~8 times more massive than its largest moon Charon. Due to their similar size, these two bodies orbit around a barycenter outside of Pluto which makes them a binary system, but not a binary planet.
Pluto is no longer considered a major planet because it doesn't meet the International Astronomical Union's (IAU) third rule for a planet: it hasn't "cleared its orbital neighborhood" of other objects, meaning its gravity isn't dominant enough to sweep away asteroids and dwarf planets in its path, like other large planets do. While it orbits the Sun and is round, its location in the crowded Kuiper Belt means it shares its orbit with many other similar bodies, leading to its reclassification as a dwarf planet in 2006.
And importantly, Venus' atmosphere still provides high protection against the Sun's radiation. Put together, this makes the Venusian upper atmosphere one of the most Earth-like places known beyond, well, Earth itself. And theoretically, some have mused, humans could pay a visit.
So, why is Venus called Earth's evil twin? Well, they're twins because they're the same size and they formed of the same materials but Venus is such a hot crazy place really not hospitable to life so that's why sometimes she's called our evil twin.
So you see, Mars is a very interesting place. It's like Earth in many ways, but it's also strange and mysterious – just like a brother. Maybe one day humans will visit or even live there, but, until then, we can continue to learn about our brother, Mars, a special part of the family of planets in our solar system.
NASA's Kepler mission has discovered a world where two suns set over the horizon instead of just one. The planet, called Kepler-16b, is the most "Tatooine-like" planet yet found in our galaxy and is depicted here in this artist's concept with its two stars.
Joshua 24:14–15 Reminds Us to Serve God
And then for us to pray that God would save us from idols in our country. We must decide if we will serve God or ourselves. Let's do that. God, we start this prayer by saying you alone are God.
From Norse mythology to the Hindu's Prithvi, Earth is personified as a goddess who usually embodies the nurturing aspects of nature. Throughout history, there has been an association with women and Earth as providers of life, sustenance, and fertility.
The planets, in order of their distance outward from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Former World No. 1 Venus Williams, a seven-time Grand Slam champion, recently married Andrea Preti in a lavish celebration in Palm Beach, Fla. Their whirlwind romance began in 2024 after meeting at a Gucci show in Milan. The couple got engaged in Tuscany and tied the knot in a five-day celebration.
On March 23, 2178, Pluto will complete its first full orbit around the Sun since its discovery. Of the five dwarf planets in the Solar System – including Eris, Ceres, Makemake, and Haumea – Pluto is easily the best-known due to its brief categorization as a regular planet.
Discovery and nomenclature
The circumbinary planet TOI-1338 b was found in July 2019 by Wolf Cukier, a 17-year-old high school student who joined the Goddard Space Flight Center as a summer intern.
Neptune is dark, cold, and very windy. It's the last of the planets in our solar system. It's more than 30 times as far from the sun as Earth is. Neptune is very similar to Uranus.