كيف تقدر تشحن جوالك بشكل لا سلكي وهو مايملك قطعة الشحن؟ خلونا نشوف.

The Video is a Tech Pills Production , for info & ADs contact info@tpprod.com
هذا الفيديو من انتاج مؤسسة تيك بيلز

للانتاج والتواصل والاعلان info@tpprod.com

موقعنا http://www.tpprod.com/ Our Website

للمزيد من الفيديوات والمعلومات التقنية يمكنكم متابعة قنواتنا المختلفة:

للتسجيل في الواتس اب والقائمة البريدية الخاص بتيك بيلز:
www.theroouf.com/techpills

للتسجيل في التليجرام الخاص بتيك بيلز:
https://telegram.me/Techpills

موقع رووف الإلكتروني لقرائة و سماع المحتوى المكتوب:
http://www.theroouf.com/

قناة UTD للمراجعات و الأجهزة الإلكترونية المختلفة:
https://www.youtube.com/user/uptodateksa2/

قناة TechPillsShow لتغطية المؤتمرات و ملخصاتها حول العالم داخليا و خارجياً:
https://www.youtube.com/user/TechPillsShow

قناة GameDoseShow المتخصصة في الألعاب الإلكترونية المختلفة و أخبارها:
https://www.youtube.com/user/GameDoseShow

قناة MeGameUWatch المخصصة للعب الألعاب المختلفة:
https://www.youtube.com/channel/UC0TAEujDDZtReFXONR-LbFg

انستجرام فيصل
https://instagram.com/faisalaalsaif/
انستجرام احمد
https://instagram.com/a7mad/

حسابات Twitter الخاصة بنا:
حساب فيصل السيف:
Tweets by falsaif
حساب أحمد بن محفوظ:
Tweets by ialkindi
ماهر الارناؤط
Tweets by Maher_Alarnaoot

حساب UTD:
Tweets by UpToDateKSA2
حساب TechPillsShow:
Tweets by TechPillsShow
حساب GameDoseShow:
Tweets by GameDoseShow
حساب MeGameUWatch:
Tweets by MeGameUWatch

The gravity of a planet, however weak it might be, is enough to pull its parent star just a little bit out of place as the planet orbits.

While the radial velocity method studies a star’s spectrum to measure the star’s “wobble” toward and away from Earth, there is another trick to measure this tell-tale motion: simply look for the star to move back and forth in the sky.

With exceptionally sharp vision, a telescope can actually see a star move relative to other stars. Astrometry is the science of precisely measuring the position of objects in the sky. If astronomers use this method to monitor a star and see that it sways with a periodic rhythm, like slow dancers at a prom, they can tell that an unseen companion — perhaps a planet — is orbiting the star and pulling it to and fro.

If a planet’s orbit around its star is angled just right, the planet will regularly pass in front of or “transit” its star from our point of view. When it does, the planet will block a tiny bit of the star’s light.

Astronomers can search for planets by watching for slight, periodic changes in the brightness of a star. If the brightness of a star changes regularly and consistently, it could mean that a planet is repeatedly transiting the star and blocking a little bit of starlight each time around.

Taking a picture of an extrasolar planet sounds like the easiest way to discover a planet, but in reality, it is probably the most difficult. Seeing the faint glow of a planet amidst the brilliant glare of its parent star is like spying a firefly buzzing around a huge spotlight from a mile away.

But it has been done. Astronomers use a dark “mask” called a coronagraph to cover up the star and most of its glare. If the planet is far enough away from its star so that it isn’t also covered by the coronagraph, a keen-eyed telescope might be able to pick out the dim reflected light of the planet shining through.

Even though a planet is so much smaller than its star, it still exerts a tiny gravitational tug on the star as it orbits. When a planet is behind its star (from our point of view), it pulls the star slightly away from us. When the planet is in front of its star, it pulls the star slightly toward us. This causes the star to wobble ever so slightly back and forth. Most planets have been discovered after astronomers caught this wobble.

Powerful telescopes equipped with a spectrograph can detect a star’s to-and-fro motion by examining the star’s light. A spectrograph, like a prism, splits a star’s light into its component colors, producing a spectrum. Some of the starlight gets absorbed as it passes through the star’s atmosphere, though, and this produces small, dark gaps or lines in the spectrum. As the star moves closer to us, these lines shift just a smidge toward the blue end of the spectrum. As the star moves away, the lines shift back toward the red end of the spectrum. Astronomers can look for orbiting planets by looking for these back-and-forth motions of the lines in a star’s spectrum.

Astronomers can discover a planet not by noticing the planet’s gravitational effects on its parent star but rather on a star much farther away.

When one celestial object passes in front of another from our point of view, the closer object’s gravity can bend and magnify the light of the more distant object, causing the distant object to appear brighter than normal for a short time. This phenomenon is called gravitational microlensing.

For example, if a closer star passes in front of a farther star, the farther star will appear temporarily brighter and then return to its normal brightness after the closer star has passed.

But if, by chance, the closer star is accompanied by an unseen planet, the farther star’s brightness will increase a second time as the planet passes in front of it.

By watching for a distant star’s brightness to intensify twice, astronomers can find out whether the closer star has a secret traveling companion.

Moonrise: The Surprisingly Diverse Array of Moons in our Solar System
Dr. Bonnie Meinke, Space Telescope Science Institute

Earth’s Moon is so familiar to us, yet there are hundreds of other moons in our solar system that still remain exotic. Take a journey from our Moon to the weird and wonderful collection of moons across interplanetary space. Explore volcanoes, oceans, and clouds that make these distant worlds much more recognizable than one might have guessed. And consider how these familiar geologic features could create ideal conditions for life to take hold and flourish!

Host: Dr. Frank Summers

Recorded live on May 6, 2014 at the Space Telescope Science Institute in Baltimore, MD, USA

For more information: http://hubblesite.org/about_us/public_talks/

With some simple ingredients, you can make your very own Tech Sandwich/Burger!
FACEBOOK:
https://www.facebook.com/pages/TechRax/192119757502890
TWITTER:
https://twitter.com/TechRax
INSTAGRAM:
TechRax

There is a fascinating workshop being held this week in Baltimore at the Space Telescope Science Institute: Habitable Worlds: Across Time and Space.

The symposium is designed to provide discussion of topics related to the challenges life faces both beginning and developing on a planetary body — either within our solar system or on distant #Exoplanets  

+Tony Darnell, +Carol Christian , physicist Eva Villaver, and +Mario Livio will hold a hangout this week to discuss, among a great many other interesting topics:

•How well does the specific challenges facing habitability on Earth extend to other planets in our solar system and exoplanets?
•What role does the galactic habitable zone play? How important is it?
•What are the limits to Earth-like life?
•Habitability of planets and moons during all phases of stellar evolution
•Habitability in low-luminosity environments

We hope you can make it live. But if you can’t, remember that it will be archived on our YouTube Channel.  Please bring any questions and comments and we’ll try to answer them. 

See you there!

Find out more about the Habitable Worlds Symposium here:
http://www.stsci.edu/institute/conference/habitable-worlds/

Watch webcasts of the talks here:
https://webcast.stsci.edu/webcast/