Latest news with #TWA-7
Time of India
14 hours ago
- Science
- Time of India
James Webb captures first direct image of an exoplanet; key details inside
credit: In a groundbreaking moment for space exploration and technology, astronomers have captured the first-ever direct image of an exoplanet using the mighty James Webb Space Telescope. This is a significant achievement that marks a major leap in the ability of the world to study worlds beyond our solar system. There exists a more fascinating world, all waiting to be explored by us! The JWST has identified a faint source of infrared light in a disk of debris surrounding a young star, called TWA-7, approximately 34 light-years away from Earth. Their intelligent observations reveal that this planet is 10 times less massive than previous exoplanets to be directly observed with a telescope; the first was discovered back in 1992. But are we sure it is an exoplanet? What is the James Webb Space Telescope? Credit: canva JWST is one of NASA 's most powerful and advanced telescopes, launched back in December 2021. It doesn't orbit the Earth like other telescopes, but it orbits the Sun 1 million miles away from the Earth at what is called the L2 or second Lagrange point. Dr. Anne-Marie Lagrange, an astrophysicist at the French National Center for Scientific Research in Paris, quotes, 'The basic problem is that the star is bright and the planet seems to be a little faint.' Usually, the starlight outwits the planets, making them impossible to spot. by Taboola by Taboola Sponsored Links Sponsored Links Promoted Links Promoted Links You May Like Adidas Three Shorts With 60% Discount, Limited Stock Available Original Adidas Shop Now Undo Dr. Anne, with all her colleagues, decided to focus on young stars that could be easily seen on the pole-on. The potential planet orbits roughly 50-52 times farther from its star than Earth is from the sun, and has a mass about one-third that of Jupiter's. Simulations of such an exoplanet in a dusty disk around a star produced images closely matching those from JWST. 'This was really why we were confident that there was a planet,' Lagrange says. What comes next? So, the team behind this magnificent discovery thinks that the JWST could soon be able to spot planets with just 10% of the mass of Jupiter, getting close to the size of Neptune. This groundbreaking discovery also gives scientists a roadmap for further space explorations and establishes ground-based telescopes that might detect even smaller and more Earth-like planets.
Yahoo
4 days ago
- Science
- Yahoo
Smallest Alien World Ever Seen Spotted by JWST in Stunning First
JWST has made another breakthrough. Around a newly formed star just 111 light-years away, the powerful space telescope has officially discovered its first exoplanet. It's called TWA-7b, and it's the smallest world that humanity has ever directly imaged. TWA-7b is a cold gas giant with about a third of the mass of Jupiter, orbiting its red dwarf host star at a staggering distance – 52 times farther than Earth orbits the Sun. In our Solar System, that distance would place TWA-7b out in the Kuiper Belt, far beyond the orbit of Pluto. Related: Stunning Direct Images of Alien Worlds Are Detailed Enough to Reveal Clouds The planet isn't the only remarkable thing here. So detailed are the observations that a team led by astronomer Anne-Marie Lagrange of the Paris Observatory in France has been able to confirm predictions about how planets form, and their interactions with their environment. The discovery, the researchers say, demonstrates the promise of JWST, not just for studying exoplanets indirectly, but for finding and studying them directly, beyond the range other instruments can reach. "The present results show that the JWST Mid-Infrared Instrument (MIRI) has opened up a new window in the study of sub-Jupiter-mass planets using direct imaging," they write in their paper. "Indeed, TWA-7b (about 100 times the mass of Earth) is at least 10 times lighter than the exoplanets directly imaged so far, and planets as light as 25 to 30 Earth masses could have been detected if present." To date, nearly 6,000 exoplanets have been confirmed, out there in the Milky Way galaxy. That's pretty exciting, considering how hard they are to discern. They're very small, very dim, and very far away; the vast majority of them have only ever been measured indirectly, based on changes their presence wreaks on the light of their stars. We've only actually directly seen around 80 exoplanets. The star TWA-7 is perfectly positioned in space for attempting to directly image an exoplanet. It's around 6.4 million years old, which is the star equivalent of a toddler – so young that it's still surrounded by a leftover disk of the material that fed the baby star as it grew. It's from these disks that planets are born. Material clumps together as it orbits the star, gradually building up until there's enough mass to constitute a world. This process creates gaps in the disk where the new planet carves out a space and creates rings, 'shepherding' the material on either side of the gap, a lot like the shepherd moons of the rings of Saturn. Well, so we think. As Lagrange and her colleagues note, "no planet responsible for these features has been detected yet." TWA-7 is oriented in such a way that its pole is pointing at Earth. That means that astronomers can see the full disk of material around it, divided into three distinct rings. Lagrange and her colleagues pointed JWST at this disk, looking to see if they could identify an exoplanet in one of the gaps between the rings, creating a cavity for itself in the material around TWA-7. "We unambiguously detected a source 1.5 arcseconds from the star, which is best interpreted as a cold, sub-Jupiter-mass planet," they write. Their analysis suggests that this world is about the same mass as Saturn. It's a marvelous discovery, one that dramatically extends the lower mass range for directly detectable exoplanets. It's also possibly only scratching the surface; the researchers believe that JWST is capable of observing worlds that are much less massive than TWA-7b. The telescope is often used to analyze exoplanet atmospheres based on the way starlight changes when it passes through. Direct imaging is an entirely different way of studying exoplanets that can reveal details that are difficult to obtain in any other way. The researchers conclude that TWA-7b is an exciting prospect for further study. "TWA-7b is very well suited for further detailed dynamical modelling of disk-planet interactions," they observe. "As it is angularly well resolved from the star, TWA-7b is suited for direct spectroscopic investigations, providing the opportunity to study the interior and the atmosphere of a non-irradiated sub-Jupiter-mass, cold (about 320 K) exoplanet, and start comparative studies with our much older and cooler Solar System giants." The research has been published in Nature. Record-Sized Comet Seen Belching Jets From Surface as It Heads Our Way Behold! World's Largest Camera Snaps Millions of Galaxies in First Pics 2032 'City-Killer' Impact Threatens Earth's Satellites, Study Finds
