The curious planet scientists have seen so far in 2023

Scientists have made great strides in honing the techniques of finding worlds outside Earth’s solar system, detecting new ones in the order of hundreds every year.

The number of confirmed exoplanets – planets orbiting stars other than the Sun – has increased to 5,4389,600 more candidates are being reviewed. Most of these are in the Milky Way, although scientists believe they discovered the first planet in another galaxy two years ago.

Statistically speaking, the growing number only scratches the surface of the planets that are considered space, Together hundreds of billions of galaxiesthe universe is likely several trillion Of the stars And if most stars have one or more planets around them, that’s an unfathomable number of worlds.

What scientists are learning is that the alien worlds are like snowflakes, each with its own unique combination of characteristics. There are water worlds, planets with multiple sunsets, volcanic worlds spewing lava, and some in unexpected shapes like footballs.

With the new James Webb Space Telescope, getting to know these worlds should become much easier. The premier space observatory will spend about 25 percent of its time studying exoplanets. Knowing what’s in another planet’s atmosphere can tell scientists a lot about the world, including whether it could be habitable.

this trappist planet couldn’t hack it

when astronomers studied a web Trappist-1B This year, they discovered that its size was the closest thing in common with Earth.

The rocky exoplanet about 41 light-years away doesn’t appear to have an atmosphere and is a toasty 450 degrees Fahrenheit. a paper published in the journal Nature, So, just the right temperature for a dystopian book-burning futureAny?

Scientists are eagerly waiting for an opportunity to study Trappist-1 Solar System, a family of seven Earth-sized planets orbiting a red dwarf, a small but violent type of star commonly found in the Milky Way. They speculate that one or two of the TRAPPIST worlds discovered six years ago may be habitable.

Although TRAPPIST-1B is unlikely to support life, researchers are just getting started on their study of this intriguing star system. They are keen to study some of the other planets, especially its neighbor TRAPPIST-1E, the fourth from the star. This is thought to be the right distance to allow liquid water to form into lakes and oceans on the planet’s surface.

an earth twin indicating an atmosphere

Astronomers get a closer look at another rocky exoplanet GJ 486 B, relatively close to our solar system at just 26 light-years away in the constellation of Virgo. Discovered two years ago, it is about 30 percent larger than Earth, orbiting a red dwarf every 1.5 days.

Despite being so close to its host star and having a scorching temperature of around 800 degrees Fahrenheit, the planet shows signs of having water vapor – a sign that the alien world may have an atmosphere swallowing up the planet. And atmospheres are important for shielding a planet from ultraviolet solar radiation, maintaining habitable temperatures, and creating the pressure needed for liquid water.

But could it be nothing more than a mirage?

Another possible explanation for the vapor searched the web It is that the water is coming from the outer layer of a nearby star, which is even cooler than the Sun, and not from the planet at all. Scientists will need more observations to determine whether the exoplanet actually has an atmosphere and how much water is present. Without an atmosphere, life – at least the kind able to flourish on Earth – would not exist.

Water vapor has been discovered on gaseous exoplanets before, but never for a rocky or terrestrial planet such as Earth, Mars, Mercury and Venus.

a shadowy lava world

want more Science More tech news delivered straight to your inbox? sign up for Mashable’s Light Speed ​​newsletter Today.

One intriguing world sits at the edge of the so-called Goldilocks zone, an area around a host star where it is neither too hot nor too cold for liquid water to exist on the planetary surface.

That’s why scientists are interested in LP 791-18d, a temperate world about the size of Earth orbiting a small red dwarf star 90 light-years away in the southern constellation Crater.

But if it sounds like heaven, consider that exoplanet Filled with raging volcanoes, half the planet is perpetually in daylight while the other half is in perpetual darkness. Together these extreme conditions could provide the necessary ingredients for a planet to form an atmosphere. Many planetary scientists believe that volcanic activity is important to a world sustaining life because the release of gases during eruptions contributes to the atmosphere and may help the planet maintain a moderate temperature.

Astronomers want to gain observation time on the Webb telescope to study the exoplanet’s atmosphere. Findings of water and methane, for example – ingredients vital to life as we know it – could be signs of potential habitat or biological activity.

sand cloud planet

Clouds swirl with sizzling, gritty grains of sand on a newly discovered world 40 light-years away from Earth.

On VHS 1256b, it’s a relentless, blistering sandstorm. Higher up in the clouds, temperatures reach 1,500 degrees Fahrenheit. Astronomers say that when the clouds get too heavy, storms likely cover the planet with a sandy mixture.

Although exoplanetThe day is only two hours shorter than ours, taking 10,000 Earth-years to make a complete trip around its two stars. A NASA Twitter account described it as “Tatooine-like”, referencing Luke Skywalker’s desert planet star wars, which featured twin sunsets. Given how far the worlds are from their stars – Pluto is about four times farther from the Sun – their light would not be that bright.

Astronomers say the observations of the exoplanet so far are exciting because they reveal how other clouds may be completely different from Earth’s water vapor clouds.