24/7 Space News
14-inch spacecraft delivers new details about 'hot Jupiters'
Rick Kohnert, systems engineer for CUTE, and former LASP graduate student Arika Egan pose with the small satellite on the CU Boulder campus. (Credit: LASP)
14-inch spacecraft delivers new details about 'hot Jupiters'
by Daniel Strain for UCB News
Boulder CO (SPX) Dec 13, 2023

A spacecraft the size of a cereal box has collected precise measurements of the atmospheres of large and puffy planets called "hot Jupiters." The findings, led by a team from the University of Colorado Boulder, could help reveal how the atmospheres around these and a host of other worlds are escaping into space.

The observations are the first results to come from a hard-working NASA spacecraft known as the Colorado Ultraviolet Transit Experiment (CUTE).

Kevin France, principal investigator for the mission, will present the group's results at a media availability Monday, Dec. 11 at 4:30 p.m. at the 2023 meeting of the American Geophysical Union in San Francisco.

The diminutive spacecraft, which measures just 14 inches in length, may be cute, but its scientific findings are anything but. Since its launch in September 2021, CUTE has trained its single ultraviolet telescope at a series of hot Jupiters, some hundreds of light-years from Earth.

Hot Jupiters are among the hottest and angriest planets in the galaxy. As their name suggests, they are gas giants like our own Jupiter. These planets, however, hug much closer to their home stars, completing an orbit roughly once every several Earth days. In the process, stellar radiation cooks hot Jupiters to thousands of degrees Fahrenheit, and their atmospheres swell to enormous sizes, a bit like bread rising in an oven.

Researchers have long suspected that this constant pummeling from stellar radiation could strip away the atmospheres from around some exoplanets over millions-to-billions of years. Data from CUTE suggest that the process might not be so simple.

The CUTE team, which includes several undergraduate and graduate students, has observed seven hot Jupiters so far, with more on the way. Some of them seem to be losing their atmospheres, but others aren't.

"The planets seem to be coming in all of the flavors," said France, associate professor in the Laboratory for Atmospheric and Space Physics (LASP) and Department of Astrophysical and Planetary Sciences.

He added that CUTE is helping scientists to build out their field guide to the many kinds of planets that exist in the Milky Way Galaxy-including those that look nothing like Earth's close neighbors.

"We want to understand how our solar system fits into the family of solar systems in the universe," France said. "That means understanding the big planets, the small planets, the ones that have life and the ones that definitely don't-and all of the important physical processes that are operating on these planets."

Getting hot in here
CUTE's road to scientific success wasn't easy.

When the spacecraft first entered into orbit around Earth, France and his colleagues quickly noticed that it seemed to be experiencing a few glitches-a normal problem for many small satellites, or CubeSats, which often test out technology that's never before flown into space. In one case, the shutter that protected CUTE's telescope kept snapping shut when it wasn't supposed to.

The team, which included several undergraduate and graduate students, didn't give up. The researchers commanded the spacecraft to open its shutter, then drained the battery that fed it, preventing the apparatus from shutting again.

"CUTE is still working and collecting data today," France said. "When we got our first real science results, it was really exciting."

CUTE observes distant planets as they pass in front of their home stars, causing ultraviolet light from those stars to dim in the process. In some cases, the spacecraft is so precise that it can detect when starlight dims by just 1%.

In a paper published in September, the researchers described their observations of a world called WASP-189b. This planet orbits a star in the constellation Libra more than 300 light-years, or thousands of trillions of miles, from Earth. It's also incredibly toasty, with its atmosphere reaching temperatures of roughly 15,000 degrees Fahrenheit, according to the team's results. That's thousands of degrees hotter than the surface of the sun.

CUTE's observations also suggest that gas is escaping from around WASP-189b at a similarly staggering rate of about 400 million kilograms (nearly 900 million pounds) per second.

Planets evolving
Not all of the planets CUTE has studied in its first two years were so exciting. In unpublished results, the team observed a second planet called MASCARA-4b that didn't seem to be losing much gas at all. Others, like KELT-9b, fell somewhere in the middle.

France and his colleagues hope that their results could help uncover why some planets lose big chunks of their atmosphere, while others remain mostly unchanged. He suspects that it has to do with a combination of the planets themselves (larger planets generate a stronger gravitational pull) and the dynamics of their stars (more active stars likely wreak more havoc on planets than sedate stars).

Those same processes potentially sculpt planets, both in and out of Earth's solar system, over time. Scientists, for example, theorize that Mars once hosted a much thicker atmosphere, but the sun eroded it away over billions of years.

Atmospheric escape may also explain the origin of a class of planets known as "super Earths," which are slightly larger than our own world.

"There's a lot of evidence that suggests that super Earths begin as planets the size of Neptune with large, puffy atmospheres, which then lose so much mass that all that is left is the rocky core and possibly a thin atmosphere," France said.

CUTE's greatest legacy may be its impact on students, he said. The mission's small team of about 20 people were involved in almost every aspect of the spacecraft's life-from building the satellite to launching it, sending it commands, then downloading and analyzing scientific data. CUTE is currently orbiting about 326 miles (525 kilometers) above Earth's surface, and is expected to reenter the atmosphere by 2027.

"All of these things are what happens on big NASA missions, just on a much larger scale," France said. "Our students and early career scientists are getting the full experience from the proposal stage all the way to getting out the science product."

Related Links
Colorado Ultraviolet Transit Experiment
Lands Beyond Beyond - extra solar planets - news and science
Life Beyond Earth

Subscribe Free To Our Daily Newsletters

The following news reports may link to other Space Media Network websites.
Seeing and Believing: 15 Years of Exoplanet Images
Greenbelt MD (SPX) Dec 13, 2023
First there was a gloriously dusty disk. Then the traceable tracks of "exocomets." But 15 years ago this fall, the star system Beta Pictoris yielded one of the most iconic pictures in astrophysics: a direct image of a planet orbiting another star. The young, bright star, some 63 light-years distant and visible to the naked eye, all but overwhelmed the faint light of the planet. When astronomers, using a European Southern Observatory telescope, subtracted the starlight, all that remained of the pla ... read more

Jeff Bezos's Blue Origin headed back into space after accident

NASA: Let's Ketchup on International Space Station Tomato Research

NASA's Commercial Partners Continue Progress on New Space Stations

Engineers Working to Resolve Issue With Voyager 1 Computer

Equatorial Launch Australia Unveils Innovative ASC Advanced Launch Pad Designs

Sierra Space's Dream Chaser New Station Resupply Spacecraft for NASA

Blue Origin scrubs return of New Shepard rocket flight due to technical issue

After a 12-day hiatus, launches resume on the Space Coast

A Soliday Before the Holidays Sols 4039-4040

A Rinse and Repeat Kind of Plan: Sols 4035-4036

Watch Your Step: Sols 4037-4038

NASA's Perseverance Rover Deciphers Ancient History of Martian Lake

China's space programme: Five things to know

China's commercial space sector achieves milestones with series of successful launches

Long March rockets mark their 500th spaceflight

CAS Space expands into Guangdong with new rocket engine testing complex

Measuring how space creates jobs and prosperity on Earth

Satellite Communications Innovator Lynk Global to Go Public via Slam Corp. Merger

USAGM enlists SES Space and Defense for advanced global satellite Broadcasting

Investor Coalition demands leadership overhaul at Terran Orbital amid CEO controversy

Apex satellite factory aiming to produce 50 units annually

Quantum Leap in secure communication: Teleporting images using light

NASA's Tech Demo Streams First Video From Deep Space via Laser

ESA leads the way towards a Zero Debris future

Some Icy Exoplanets May Have Habitable Oceans and Geysers

Research unveils atmospheric dynamics of runaway greenhouse effect

14-inch spacecraft delivers new details about 'hot Jupiters'

NEOWISE space telescope marks 10 Years on orbit as End of Mission looms

Webb rings in the holidays with the ringed planet Uranus

Unwrapping Uranus and its icy moon secrets

Juice burns hard towards first-ever Earth-Moon flyby

Fall into an ice giant's atmosphere

Subscribe Free To Our Daily Newsletters


The content herein, unless otherwise known to be public domain, are Copyright 1995-2023 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.