Night

From WikiMD's medical encyclopedia

Night is the period of time when the Sun is below the horizon. This occurs after dusk. The opposite of night is day (when the Sun is above the horizon).

Overview

Night or nighttime is the period of time between the end of the twilight and sunrise. It is characterized by the absence of natural light produced by the Sun. Instead, the sky is illuminated by the Moon, stars, and other celestial bodies. The start and end times of night vary based on factors such as season, latitude, longitude, and local weather conditions.

Phenomena

During the night, several phenomena can be observed. These include nocturnal animals becoming active, the visibility of astronomical objects, and the occurrence of certain weather phenomena.

Nocturnal Animals

Many animals, such as bats and owls, are nocturnal, meaning they are most active during the night. These animals have adapted to life in the dark and often have heightened senses such as improved hearing or night vision.

Astronomical Observations

Nighttime is the best time for astronomy as the absence of sunlight allows for a clear view of the stars and other celestial bodies. This is also the time when phenomena such as meteor showers are most visible.

Weather Phenomena

Certain weather phenomena, such as the formation of dew and frost, occur predominantly at night. This is due to the drop in temperature that typically occurs after sunset.

Cultural Aspects

Nighttime has a significant impact on culture and society. It is often associated with rest and relaxation as most people sleep during this time. However, it can also be a time of activity, particularly in urban areas where nightlife is a major part of the local culture.

See Also

WHO Rod.svg
This article is a medical stub. You can help WikiMD by expanding it!
PubMed
Wikipedia


Stub icon
   This article is a medical stub. You can help WikiMD by expanding it!
Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Transform your life with W8MD's budget GLP-1 injections from $125.

W8mdlogo.png
W8MD weight loss doctors team

W8MD offers a medical weight loss program to lose weight in Philadelphia. Our physician-supervised medical weight loss provides:

NYC weight loss doctor appointments

Start your NYC weight loss journey today at our NYC medical weight loss and Philadelphia medical weight loss clinics.

Linkedin_Shiny_Icon Facebook_Shiny_Icon YouTube_icon_(2011-2013) Google plus


Advertise on WikiMD

WikiMD's Wellness Encyclopedia

Let Food Be Thy Medicine
Medicine Thy Food - Hippocrates

Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates, categories Wikipedia, licensed under CC BY SA or similar.

Contributors: Prab R. Tumpati, MD