Connect with us
The James Webb Space Telescope discovered methane in the atmosphere The James Webb Space Telescope discovered methane in the atmosphere

News

The James Webb Space Telescope discovered methane in the atmosphere of exoplanet WASP-80 b

Published

on

This discovery is significant because for a long time, methane was not detected in the atmospheres of exoplanets, unlike water vapor, which has been detected in the atmospheres of more than ten exoplanets. At the same time, methane is widespread in the atmospheres of the gas giants of our solar system, such as Jupiter, Saturn, Uranus and Neptune.

The discovery belongs to scientists from NASA and Arizona State University. WASP-80 b, with a temperature of about 825 Kelvin, is a “hot Jupiter” – meaning that the planet is similar in size and mass to Jupiter, but its temperature is somewhere between the temperature of hot Jupiters (for example, planet HD 209458 b with a temperature of 1450 K) and cold Jupiters, where the temperature is about 125 K.

The James Webb Space Telescope discovered methane in the atmosphere of exoplanet WASP-80 b

Artist’s rendering of “hot Jupiter” WASP-80 b, whose color may appear bluish to the human eye due to the lack of high-altitude clouds and the presence of methane in the atmosphere, detected by the James Webb Space Telescope. Source: NASA

WASP-80 b orbits the red dwarf every three days and is located 163 light-years away in the constellation Aquila. Due to the close distance between the planet and its star, and the distance of both objects from us, we cannot see this planet directly even with modern telescopes, including the James Webb. Instead, the researchers study the combined light from the star and planet using the transit method (which is commonly used to detect exoplanets) and the eclipse method.

The transit method allows you to observe the system at the time when the planet passes in front of the star. At this time, the atmospheric shell of the planet is illuminated by the star along its day and night boundaries. At certain wavelengths where molecules in a planet’s atmosphere absorb light, the atmosphere becomes denser and blocks more starlight, resulting in deeper dimming compared to other wavelengths where the atmosphere allows light to pass through. This method allows scientists to determine the composition of a planet’s atmosphere by determining which spectral lines are blocked.

The eclipse method, on the other hand, allows us to observe the system at the time when the planet passes behind its star relative to our position. This causes another small drop in the overall luminosity graph. Analysis of eclipse spectra allows us to determine which molecules in a planet’s atmosphere absorb light at certain wavelengths.

The initial observations were transformed into spectra that show how the planet’s atmosphere interacts with different wavelengths of light. Two types of models were used to interpret these spectra. One model was flexible and included different combinations of methane, water and temperature to determine the best fit to the observed data. Another model used existing data on the physics and chemistry of exoplanets to estimate expected levels of methane and water.

Both types of models came to the same conclusion: the detection of methane. To ensure the correctness of the results, scientists used statistical methods and assessed the probability of methane being detected by chance. The results exceeded the 5 Sigma gold standard, meaning the likelihood of a false methane detection is very low.

This result makes it possible to compare the planets of our solar system with planets beyond it. And James Webb will provide a more complete picture of WASP-80 b’s atmosphere and study the content of other substances, such as carbon monoxide and carbon dioxide.

Click to comment

Leave a Reply

Your email address will not be published.

Car News

The newest Toyota Camry has not become a hit in China, even despite its low prices. In two months, only 8 thousand pre-orders were collected

Published

on

The newest Toyota Camry has not become a hit in

The joint venture GAC Toyota reported on car sales in February of this year: last month the company sold 43,271 cars. By comparison, GAC Toyota sold 71,875 vehicles in January. The drop in sales is explained by the New Year in China (and, accordingly, the decline in consumer activity during this period), but sales also decreased relative to February last year, by an impressive 35%.

The newest Toyota Camry has not become a hit in China, even despite its low prices.  In two months, only 8 thousand pre-orders were collected

The newest Toyota Camry has not become a hit in China, even despite its low prices.  In two months, only 8 thousand pre-orders were collected

Statistics on pre-orders for the newest Toyota Camry, the ninth generation sedan, have also been announced. Since January 1, a total of 8,049 purchase applications have been issued. And this is not enough: for comparison, 5 thousand orders were placed in China for the newest Toyota Land Cruiser 250 in just an hour. Perhaps Camry sales will increase after March 6, when the new Camry officially enters the Chinese market: then retail prices will be announced, and they are usually lower than pre-order prices.

Continue Reading

Car News

The newest Toyota Camry has not become a hit in China, even despite its low prices. In two months, only 8 thousand pre-orders were collected

Published

on

The newest Toyota Camry has not become a hit in

The joint venture GAC Toyota reported on car sales in February of this year: last month the company sold 43,271 cars. By comparison, GAC Toyota sold 71,875 vehicles in January. The drop in sales is explained by the New Year in China (and, accordingly, the decline in consumer activity during this period), but sales also decreased relative to February last year, by an impressive 35%.

The newest Toyota Camry has not become a hit in China, even despite its low prices.  In two months, only 8 thousand pre-orders were collected

The newest Toyota Camry has not become a hit in China, even despite its low prices.  In two months, only 8 thousand pre-orders were collected

Statistics on pre-orders for the newest Toyota Camry, the ninth generation sedan, have also been announced. Since January 1, a total of 8,049 purchase applications have been issued. And this is not enough: for comparison, 5 thousand orders were placed in China for the newest Toyota Land Cruiser 250 in just an hour. Perhaps Camry sales will increase after March 6, when the new Camry officially enters the Chinese market: then retail prices will be announced, and they are usually lower than pre-order prices.

Continue Reading

Car News

Not a Cybertruck, but also unique. Changan Hunter introduced – the world’s first pickup truck with a sequential hybrid powertrain

Published

on

Not a Cybertruck but also unique Changan Hunter introduced

Changan has officially introduced the new Changan Hunter pickup truck in China, and it is a unique vehicle: it is the first sequential hybrid in its class. At least that’s what the company itself says.

Not a Cybertruck, but also unique.  Changan Hunter introduced - the world's first pickup truck with a sequential hybrid powertrain

The car is available in eight trim levels, prices vary from 19.45 to 31.15 thousand dollars. And the basic version is rear-wheel drive – the power of this option is 177 hp; in the top version, a 95 hp motor is installed on the front axle. The traction battery capacity is 31.18 kWh, the pure electric range is 180 km, the maximum range is 1031 km (according to measurements using the CLTC method). To charge the traction battery, a 2.0-liter gasoline turbo engine with a power of 190 hp is installed under the hood, and it has no connection with the wheels.

Not a Cybertruck, but also unique.  Changan Hunter introduced - the world's first pickup truck with a sequential hybrid powertrain

Changan Hunter can be either with a regular single cabin or with a double cabin. The dimensions and wheelbase of the car in the first case are 5380 × 1930 × 1885 mm and 3180 mm, in the second – 5630 × 1930 × 1885 mm and 3430 mm. Accordingly, the dimensions of the loading platform also differ: 1600 × 1595 × 500 mm and 1850 × 1595 × 500 mm.

Not a Cybertruck, but also unique.  Changan Hunter introduced - the world's first pickup truck with a sequential hybrid powertrain

Two additional motors and a heavy traction battery reduced the vehicle’s carrying capacity – it is only 495 kg. But the pickup can power household appliances or power tools: there is an outlet with a power output of 3.3 kW.

The Changan Hunter is equipped with a digital dashboard with a 7.5-inch diagonal screen, a media system with a 12-inch screen, a rain sensor, cruise control, 40 W wireless charging for a smartphone, leather interior, heated seats and steering wheel. Air ducts are provided for rear passengers.

Continue Reading

Most Popular