Definitions for first light
first light

Princeton's WordNetRate this definition:0.0 / 0 votes

1. dawn, dawning, morning, aurora, first light, daybreak, break of day, break of the day, dayspring, sunrise, sunup, cockcrownoun

   the first light of day

   "we got up before dawn"; "they talked until morning"

WiktionaryRate this definition:0.0 / 0 votes

1. first lightnoun

   Dawn; sunrise; the moment at which the sun can first be seen on the horizon.

ChatGPTRate this definition:0.0 / 0 votes

1. first light

   First light usually refers to the time of day when light from the sun first appears in the morning, also known as dawn or daybreak. In the field of astronomy, it can also refer to the first time a telescope is used to take an astronomical image after it has been constructed or adjusted.

WikidataRate this definition:0.0 / 0 votes

1. First light

   In astronomy, first light is the first use of a telescope to take an astronomical image after it has been constructed. This is often not the first viewing using the telescope; optical tests will probably have been performed during daylight to adjust the components. The first light image is normally of little scientific interest and is of poor quality since the various telescope elements are yet to be adjusted for optimum efficiency. Usually, a well-known and spectacular astronomical object is chosen. Despite this, a first light is always a moment of great excitement, both for the people who designed and built the telescope, and for the astronomical community. For example, the 200-inch Hale Telescope saw first light January 26, 1949, targeting NGC 2261 under the direction of American astronomer Edwin Powell Hubble. The image was published in many magazines. The Large Binocular Telescope had its first light with a single primary mirror on October 12, 2005, which was a view of NGC 891. The second primary mirror was installed in January 2006 and became fully operational in January 2008. In physical cosmology, first light refers to the light emitted from the first generation of hyperstars, formed less than a billion years after the big bang, which brought to an end cosmological dark ages.

Dictionary of Military and Associated TermsRate this definition:0.0 / 0 votes

1. first light

   The beginning of morning nautical twilight; i.e., when the center of the morning sun is 12 degrees below the horizon.

Matched Categories

1. • Hour

How to pronounce first light?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say first light in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of first light in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of first light in Pythagorean Numerology is: 2

Examples of first light in a Sentence

1. Paul Hertz:

   In a sea of stars brimming with new worlds, TESS is casting a wide net and will haul in a bounty of promising planets for further study, this ‘first light’ science image shows the capabilities of TESS’ cameras, and shows that the mission will realize its incredible potential in our search for another Earth.

2. Robert Madonna:

   When Thomas Edison installed the first light bulb, that must have been magical. Thomas Edison's how smart technology today should be in the home.

3. Paul Masterton:

   I often go up there to enjoy wildlife [and]we got up at 4 a.m. and try to be there for first light as its the best time to spot wildlife, the heather is blooming right now, we have not seen any deer there before. There was a mum roe deer and two little ones, like real-life Bambis.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=first light
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/First_Light
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=first light
5. ^ Dictionary of Military and Associated Terms
   https://www.tradoc.army.mil/wp-content/uploads/2020/10/AD1029823-DOD-Dictionary-of-Military-and-Associated-Terms-2017.pdf