Tech
Signs of the presence of the first planet outside our galaxy
- Paul Rinkon
- Science Editor – BBC Website
Decisions were made based on the observation of X-ray binaries
Astronomers have discovered signs of what might be the first planet outside our galaxy.
So far, scientists have discovered about 5,000 planets orbiting stars outside our solar system, but they are all located within the Milky Way.
The possible planet where signals were detected by NASA’s lunar telescope is located in the constellation Messier 51.
The galaxy is located 28 million light-years from the Milky Way.
These new results depend on the occurrence of astronomical traffic, when a planet passes in front of a star, blocking some of the star’s light, and this leads to a blur in its luminosity as observed by the telescope.
This common technique has previously been used to locate thousands of planets outside our solar system.
Dr. Roxanne Stefano and his colleagues studied the blurring of X-ray images of a type of object called an X-ray diode.
This object usually consists of a neutron star or a black hole that pulls gas from a partner star. The object closest to the neutron star becomes very hot and glows at the X-ray wavelength.
Because the area where X-rays are emitted is small, the path of a planet in front of it can block most or all of the X-rays, making it easier to observe astronomical traffic.
The team members used this technology to find a possible planet with a binary system called M51-ULS-1.
Dr Di Stefano of the Harvard-Smithsonian Center for Astrophysics in Cambridge, USA, told the BBC: “The method we have developed and used is currently the only method that can be used to detect planetary systems in other galaxies.”
Star Meeting Messier51
“It is a kind of method, very suitable for detecting planets orbiting X-binary stars, which can measure the optical curve from any distance.
The future of planetary observation
A binary is a black hole or neutron star that orbits a sub-star 20 times the mass of the Sun. A neutron star is a remnant nucleus from a previous massive star.
The astronomical traffic lasted about 3 hours, during which the X-ray emission was reduced to zero. Based on this and other information, astronomers estimated that the probable planet would be the size of Saturn. It orbits a neutron star or black hole at a distance equal to twice the orbit of Saturn orbiting the Sun.
Dr de Stefano said techniques used successfully to detect planets within the Milky Way outside the Solar System could be blocked if used to monitor other galaxies. This is because it reduces the amount of light that can reach the telescope over long distances.
Excess material accumulates in a narrow space (as we see from Earth), making it difficult to verify a star on its own.
The astronomer says that X-rays “only allow the isolation of dozens of sources throughout the entire galaxy, so they can be verified and part of them so bright in X-rays that the light curve within them can be measured.”
“Finally, large X-ray emissions come from a small area that can be largely or completely obscured by a planet’s path.”
The researchers agree that more data is needed to confirm their explanations.
Among the challenges facing research is that the planet’s vast orbit will not interfere with its binary partner again after 70 years, making it impossible to monitor it in close proximity.
Astronomers put forward another explanation, namely that blurring can occur as a cloud of gas and dust passes in front of the X-ray source.
But they rejected this explanation because the properties of the event did not match the elements of the gas cloud.
Julia Princeton of Princeton University in New Jersey said, “We know what’s announced is exciting and bold, so we expect other astronomers to look at it very carefully.
“We believe our evidence is strong and the matter is now up for scientific research,” he added.
New generation optical telescopes and infrared telescopes cannot overcome congestion and fading, so X-ray wavelength monitoring would be the best way to detect planets in other galaxies, Dr. de Stefano said.
But he said another technique called “microlensing” could help detect planets outside our galaxy in the future.
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Tech
After professional testing, the iPhone 15 Pro Max is not the best phone for photography
Apple’s new phone, the iPhone 15 Pro Max, has undergone extensive tests for the rear camera to record photos and video clips at the popular DxOMark digital camera testing site.
DxOMark is the leading platform and most important rating site among professional camera testing sites for smartphones and other digital cameras. This site features photography experts and reviews cameras for detailed testing of photography or recording in various modes. Film.
Recently, Apple’s latest iPhone 15 Pro Max underwent extensive camera tests from DxOMark for a real assessment apart from the specification numbers, and the phone has already scored a real hit.
pointed out Final report For the test, Apple’s most expensive phone won the tests, reaching 8 levels of improvement compared to the previous generation iPhone 14 Pro Max, and it took the second place among the best smartphones for photography with the rear camera.
The Huawei P60 Pro is the only device that has given better results than the Apple device and received a higher rating.
During the evaluation, DxOMark testers were impressed by the brightness and contrast of the iPhone 15 Pro Max’s images, even in low-light (night) scenes, with excellent skin color processing.
The report said that the phone was rated as the best in terms of image brightness, color contrast, shadow rendering, and background isolation mode. According to DxO ratings, it was also said to be the best phone for video shooting.
The report also highlighted that the flaws that didn’t make the iPhone 15 Pro Max the best among all the competition appeared in the tests, where colors differed in low light and the photos taken at night were noisier than some competitors. with dynamic range. A little less in hard outdoor scenes.
The most important thing that can be distinguished about the phone after the test is that the new telephoto lens, telephoto and 5X zoom on the iPhone 15 Pro Max, which is one of the most important revolutionary changes this year, is not really there. Do what the company says.
Apple confirmed at the phone announcement event that the new zoom lens will work with focal lengths up to 120mm with standard options for 28mm and 35mm, similar to what professional DSLR cameras offer with advanced lenses.
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In practice, the camera results are actually a crop of said image dimensions and not the default focal lengths mentioned earlier, because images are taken through lenses and then cropped to match professional dimensions.
The report confirmed that the new lens provides very impressive results, especially when there is enough light, and it can distinguish backgrounds and isolate targets professionally.
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Tech
Scientists have found the best place to build a lunar base
Published: 09/28/2023 (Last Updated: 09/28/2023 at: 08:09)
Bethlehem – together – scientists found the best place to build a lunar base, they explored it and took into account the surrounding conditions.
At the south pole of the Moon, between two craters there is an area with a large body of water and permanent sunlight, providing a good environment for human habitation.
Antarctica has long been considered a good place for colonization because many of its craters are exposed to constant sunlight and shade so that electricity can be generated using solar panels, while there is ice to extract water.
Areas around some of these craters have been explored by lunar rovers, such as India’s recent Chandrayaan-3 mission, but their goal is to collect scientific data rather than search for the primary location.
Five holes are being considered because of their constant sunlight, but the amount of water and other resources must be considered before deciding on a location.
According to New Scientist, scientists from the University of Atacama in Chile analyzed data from five potential craters.
Five craters are called De Gerlach, Henson, Sverdrup and Shackleton, one of which is an unnamed crater.
The scientists took into account the density of carbon dioxide in the frozen water, other energy sources, ease of access and interactions with the Earth, as well as the distribution of water ice, slope angles and the amount of sunlight available to each hole. .
Where is the place located?
Team leader Giovanni Leone told New Scientist that an area of about 5 square kilometers with two craters known as the Sverdrup-Hensen is the best place to install the first platform.
The area has a relatively flat surface, which makes construction and transportation easier, as well as more ice and minerals in nearby shadowy areas. There are areas exposed to permanent sunlight, for power generation and contact with the ground.
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Tech
Simple Ways to Fix Camera Not Working Problem on Mac
Apple Mac computers have a built-in webcam, which you can use to make video calls with friends and family through the FaceTime application, or participate in online meetings with various applications such as Zoom, Microsoft Teams, Google Meet, and other video conferencing applications. On a MacBook computer.
But sometimes, when using a particular application, the Mac computer camera may suddenly stop working and a message will appear saying that the camera is not connected. In this case, you can easily fix the problem by following the methods we describe below:
1- Close and restart the app:
First, you can close the application you are working on and try launching it again. This will help you fix any problems or errors that prevent the MacBook computer camera from working properly.
Using more than one Mac camera app at the same time can also cause this problem. This can be easily fixed by using the Force Quit option to close apps. To access this option, you can click the Apple menu, choose Force Quit from the bottom to display a list of active apps, and close them.
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2- Update the application and operating system:
Another simple solution to this problem is to update the apps and operating system on your MacBook to the latest version. Sometimes, the problem may be with the app and not with the MacBook camera. So check if the app is updated and if it is up to date then try uninstalling and reinstalling the app.
On the other hand, make sure that the macOS operating system on your Mac computer is updated to the latest version. The importance of this is that Apple releases software updates to fix bugs and vulnerabilities that can prevent applications on Mac computers from working properly.
Additionally, you can try launching another app that uses your MacBook camera to make sure the camera is working. If it works, the problem is with the app, not the computer’s camera.
3- Grant the app access to the camera:
You may not grant access to the app you want to use the camera. So, to allow this app to access your MacBook camera, follow these steps:
- Click the Apple menu and select System Settings.
- Choose (Privacy and Security) from the sidebar and click (Camera).
- A list will appear with all the applications installed on your MacBook that require access to the camera. From there, turn on the toggle next to the app you want to use the camera for.
- After granting the application access to the camera, it must be closed and restarted for it to work properly.
4- Restart your Mac computer:
Restarting your Mac computer is one of the easiest ways to fix many of the most common problems you may encounter while using the computer, and it can also help fix a problem where the camera stops working.
To restart your Mac, click the Apple menu and select Restart from the bottom. After restarting the computer, launch the app you want to use the camera and make sure it works.
5- Check if the camera light appears:
To check that your camera is working properly, launch any app that uses your MacBook’s camera: FaceTimeThen make sure the camera light is on.
Otherwise, you can check whether your Mac computer detects the camera or not by following these steps:
- Go to (System Settings), then (General).
- Click About, then System Report.
- Select Camera from the Hardware section in the sidebar on the left side.
- If you can see information about the camera model: Model ID and Unique ID on the right, it means that your Mac computer can detect the camera. If you don’t see these details, it means your computer is not detecting the camera.
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