Quasars are the most luminous objects in the universe and are powered by material accreting onto supermassive black holes at the centers of galaxies.
Astronomy
Sep 23, 2024
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65
What if you could hide an image in plain sight—so well that even the most advanced cameras couldn't detect it? Imagine encoding visual information using the properties of quantum optics, rendering it invisible to normal ...
This week, a billionaire made a spacewalk, archaeologists found a new, isolated Neanderthal lineage and the James Webb Space Telescope revealed the extreme outskirts of the Milky Way. And a few other things happened:
An international team of researchers from the University of Turku, Finland, and the University of Tours, France, aimed to validate the use of infrared thermal imaging as a non-invasive tool for assessing stress responses ...
Plants & Animals
Sep 11, 2024
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5
Scientists may have found an antidote to pesticides that are directly and indirectly killing bees, according to a new paper published in Nature Sustainability showing promising early results in common eastern bumblebees.
Ecology
Sep 11, 2024
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112
Cloud enthusiasts have a new tool to investigate striking formations in the skies above the red planet. A browsable database of 20-years-worth of images of clouds and storms, created by the German Aerospace Centre (DLR) in ...
Planetary Sciences
Sep 10, 2024
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41
Rover trials in a quarry in the U.K. showing a four-wheeled rover, known as Codi, using its robotic arm and a powerful computer vision system to pick up sample tubes.
Space Exploration
Sep 6, 2024
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23
Imagine a sensor so sensitive it can detect early cancer in a single drop of blood, enabling diagnosis and treatment before the first symptoms—possibly before a tumor even forms.
Bio & Medicine
Sep 5, 2024
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13
Northern elephant seals were repeatedly captured on camera in the deep Pacific Ocean using sonar from an Ocean Networks Canada (ONC) observatory as a dinner bell to forage for their next fish feast, according to a new study ...
Plants & Animals
Sep 5, 2024
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437
Like many people, I first encountered drones when they looked like toys, something fun to play with and be entertained by. Not long afterward, I was waiting for a boat on my commute to work, and a drone hovered overhead, ...
Political science
Aug 30, 2024
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A camera is a device that records images, either as a still photograph or as moving images known as videos or movies. The term comes from the camera obscura (Latin for "dark chamber"), an early mechanism of projecting images where an entire room functioned as a real-time imaging system; the modern camera evolved from the camera obscura.
Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera's opening to gather the incoming light and focus all or part of the image on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.
A typical still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button.
This text uses material from Wikipedia, licensed under CC BY-SA
