Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Download
Faster access than browser!
 

Heliometer

Index Heliometer

A heliometer (from Greek ἥλιος hḗlios "sun" and measure) is an instrument originally designed for measuring the variation of the sun's diameter at different seasons of the year, but applied now to the modern form of the instrument which is capable of much wider use. [1]

17 relations: Achromatic lens, Astronomical seeing, Astronomy, Filar micrometer, Friedrich Bessel, Great refractor, Greek language, John Dollond, Joseph von Fraunhofer, Micrometer, Objective (optics), Pierre Bouguer, Season, Stellar parallax, Sun, W. H. Freeman and Company, 61 Cygni.

Achromatic lens

An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration.

New!!: Heliometer and Achromatic lens · See more »

Astronomical seeing

Astronomical seeing is the blurring and twinkling of astronomical objects like stars due to turbulent mixing in the Earth's atmosphere, causing variations of the optical refractive index.

New!!: Heliometer and Astronomical seeing · See more »

Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

New!!: Heliometer and Astronomy · See more »

Filar micrometer

A filar micrometer is a specialized eyepiece used in astronomical telescopes for astrometry measurements, in microscopes for specimen measurements, and in alignment and surveying telescopes for measuring angles and distances on nearby objects.

New!!: Heliometer and Filar micrometer · See more »

Friedrich Bessel

Friedrich Wilhelm Bessel (22 July 1784 – 17 March 1846) was a German astronomer, mathematician, physicist and geodesist.

New!!: Heliometer and Friedrich Bessel · See more »

Great refractor

Great refractor refers to a large telescope with a lens, usually the largest refractor at an observatory with an equatorial mount.

New!!: Heliometer and Great refractor · See more »

Greek language

Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.

New!!: Heliometer and Greek language · See more »

John Dollond

John Dollond FRS (10 June O.S. (21 June N.S.) 170630 November 1761) was an English optician, known for his successful optics business and his patenting and commercialization of achromatic doublets.

New!!: Heliometer and John Dollond · See more »

Joseph von Fraunhofer

Joseph Ritter von Fraunhofer (6 March 1787 – 7 June 1826) was a Bavarian physicist and optical lens manufacturer.

New!!: Heliometer and Joseph von Fraunhofer · See more »

Micrometer

A micrometer, sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw widely used for precise measurement of components in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers.

New!!: Heliometer and Micrometer · See more »

Objective (optics)

In optical engineering, the objective is the optical element that gathers light from the object being observed and focuses the light rays to produce a real image.

New!!: Heliometer and Objective (optics) · See more »

Pierre Bouguer

Pierre Bouguer (16 February 1698, Croisic – 15 August 1758, Paris) was a French mathematician, geophysicist, geodesist, and astronomer.

New!!: Heliometer and Pierre Bouguer · See more »

Season

A season is a division of the year marked by changes in weather, ecology, and amount of daylight.

New!!: Heliometer and Season · See more »

Stellar parallax

Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.

New!!: Heliometer and Stellar parallax · See more »

Sun

The Sun is the star at the center of the Solar System.

New!!: Heliometer and Sun · See more »

W. H. Freeman and Company

W.

New!!: Heliometer and W. H. Freeman and Company · See more »

61 Cygni

61 Cygni Not to be confused with 16 Cygni, a more distant system containing two G-type stars harboring the gas giant planet 16 Cygni Bb.

New!!: Heliometer and 61 Cygni · See more »

References

[1] https://en.wikipedia.org/wiki/Heliometer

OutgoingIncoming
Hey! We are on Facebook now! »