Science
Locked and loaded! James Webb Telescope locks on star for guidance in space
A few days after it began calibrating the mirrors, the James Webb Telescope locked onto a guide star with its fine guidance sensor to keep the telescope pointed with high precision. After the telescope first detected starlight in a near-infrared (NIRCam) camera, engineers launched the Fine Guidance Sensor on Jan. 28 for activity and functional testing.
Developed in conjunction with Canada’s Near Infrared Imager and Slitless Spectrometer, the sensor measures the exact position of the guide star in its field of view 16 times per second and sends adjustments to the telescope’s fine-steering mirror about three times per second.
The sensor is so powerful that someone in New York City can see the blinking eye movement of someone 500 kilometers away on the Canadian border, said FGS and NIRISS principal investigators René Doyon and Nathalie Ouellette.
“Webb’s 18 primary segments are not yet aligned, so each star appears as 18 duplicate images. On February 13, FGS successfully acquired and tracked one of the constellations for the first time.
It should be noted that engineers now use FGS guidelines in most telescope mirror alignment procedures and provide diagnostic information for mirror alignment. The telescope is in a three-month commissioning phase as it receives the first batch of starlight photons that traveled through the observatory and were captured by the Near Infrared Camera (NIRCam) instrument.
Before the telescope was used in the vacuum of space, it made several sightings on the ground.
The James Webb Space Telescope, the successor to the legendary Hubble Space Telescope, was launched in December from the European Spaceport in French Guiana on a powerful Ariane 5 rocket to a destination nearly 15,00,000 kilometers from its parent star .
Developed by scientists and engineers from 14 countries around the world, the telescope required 40 million man-hours to complete before it was attached to the rocket. The telescope is so sensitive that it could theoretically detect bumblebee heat at the Moon’s distance from Earth.
Complete News Source : India Today
health and remedies
Patterns of behaviour that emerge after trauma
Trauma is a deeply distressing or disturbing experience that can leave a lasting impact on a person’s mental and emotional health. It can result from a range of events, such as natural disasters, accidents, physical or emotional abuse, or military combat. Trauma can have a significant effect on a person’s behavior and can manifest in various ways. Here are some patterns of behavior that often emerge after trauma:
- Hyperarousal: After experiencing trauma, a person may feel constantly on edge, with heightened levels of anxiety and tension. This can manifest as irritability, restlessness, and difficulty sleeping.
- Avoidance: Trauma can also cause a person to avoid situations, people, or places that remind them of the traumatic experience. This can lead to social withdrawal, isolation, and a loss of interest in previously enjoyable activities.
- Emotional numbness: Trauma can cause a person to feel emotionally disconnected or numb, making it difficult for them to experience positive emotions such as joy or love.
- Hypervigilance: A person who has experienced trauma may be hyper-aware of their surroundings and perceive threats where none exist. This can lead to an increased sense of danger, which can trigger anxiety or panic attacks.
- Flashbacks: Trauma can cause a person to experience vivid and intrusive memories of the traumatic event. These flashbacks can be triggered by a range of stimuli, such as sights, sounds, or smells.
- Guilt and shame: Trauma can cause a person to experience feelings of guilt, shame, and self-blame. They may feel responsible for what happened to them, even when it was beyond their control.
- Substance abuse: Trauma can lead to the use of drugs or alcohol as a way of coping with difficult emotions. This can quickly become a self-destructive pattern of behavior that exacerbates the trauma.
It’s important to note that not everyone who experiences trauma will display all of these behaviors, and that each person’s response to trauma is unique. However, recognizing these patterns of behavior can help individuals and their loved ones identify when trauma may be a contributing factor to mental and emotional health challenges. Seeking professional support, such as therapy or counseling, can help individuals process their trauma and learn healthy coping mechanisms to manage their behavior.
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