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2. Astronomical spectroscopy - Wikipedia

   en.wikipedia.org/wiki/Astronomical_spectroscopy

   The Star-Spectroscope of the Lick Observatory in 1898. Designed by James Keeler and constructed by John Brashear.. Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, ultraviolet, X-ray, infrared and radio waves that radiate from stars and other celestial objects.

3. Multimeter - Wikipedia

   en.wikipedia.org/wiki/Multimeter

   Analog multimeter Digital multimeter. A multimeter (also known as a volt-ohm-milliammeter, volt-ohmmeter or VOM) [1] is a measuring instrument that can measure multiple electrical properties. [2] [3] A typical multimeter can measure voltage, resistance, and current, [4] in which case can be used as a voltmeter, ohmmeter, and ammeter.

4. Astrophysics - Wikipedia

   en.wikipedia.org/wiki/Astrophysics

   Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. [1] [2] As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space—what they are, rather than where they are", [3] which is studied ...

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Instrumentation - Wikipedia

   en.wikipedia.org/wiki/Instrumentation

   Instrumentation is a collective term for measuring instruments, used for indicating, measuring, and recording physical quantities.It is also a field of study about the art and science about making measurement instruments, involving the related areas of metrology, automation, and control theory.

7. The 6 best and 6 worst celebrity Christmas albums - AOL

   www.aol.com/news/6-best-6-worst-celebrity...

   Every year, celebrities try to capitalize on the holiday season by releasing festive music. Singers like Mariah Carey, Ariana Grande, and Michael Bublé managed to perfect the cheesy art form.

8. Hilarious Horse Hams It up Instead of Following Script When ...

   www.aol.com/hilarious-horse-hams-instead...

   Amanda explains what Wesley was doing in the caption, "In the scene, the actor is to check a notification on his phone. Each time the actor tried to look at his phone, Wesley thought he was taking ...

9. Celestial navigation - Wikipedia

   en.wikipedia.org/wiki/Celestial_navigation

   A diagram of a typical nautical sextant, a tool used in celestial navigation to measure the angle between two objects viewed by means of its optical sight. Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator to accurately determine their actual current physical position in space or on the ...