NASA Shorts

0:34

Why don't Eclipse happens twice a Month???

It's not often that we get a chance to see our planet's shadow, but a lunar eclipse gives us a fleeting glimpse. During these rare events, the full Moon rapidly darkens and then glows red as it enters the Earth's shadow. Though a lunar eclipse can be seen only at night, it's worth staying up to catch the show. The next lunar eclipse visible from the western hemisphere will take place in the early morning hours of April 15, 2014, from about 2:00 am - 5:30 am Eastern Daylight Time (EDT).

6 months ago 28 views

0:39

Why Moon Turn Red???

The phenomenon of a red Moon, often referred to as a "Blood Moon," occurs during a lunar eclipse when the Earth comes directly between the Sun and the Moon. The Earth's atmosphere scatters sunlight in all directions, and during an eclipse, the only light that reaches the Moon has to pass through the Earth's atmosphere. Here's why the Moon turns red: Rayleigh Scattering: The Earth's atmosphere scatters shorter wavelengths of light (blue and green) more effectively than longer wavelengths (red and orange). This is known as Rayleigh scattering. When the sunlight passes through the Earth's atmosphere, most of the blue and green light is scattered away, leaving the longer wavelengths to dominate. Red and Orange Hues: As a result of Rayleigh scattering, the remaining light that reaches the Moon consists of red and orange hues. This is why the Moon takes on a reddish or coppery appearance during a lunar eclipse. Sunset and Sunrise Effect: The red Moon is reminiscent of the colors we see during sunrise or sunset on Earth. This is because the same scattering effect occurs when the Sun is near the horizon, leading to the warm, reddish tones we associate with these times of day. Atmospheric Conditions: The exact shade of red can vary from one eclipse to another, depending on atmospheric conditions. Particles and pollutants in the Earth's atmosphere can affect the color and intensity of the red hue. In summary, the Moon turns red during a lunar eclipse due to the scattering of shorter wavelengths of light by the Earth's atmosphere, which allows the longer wavelengths, such as red and orange, to reach and illuminate the Moon. This stunning celestial event is a result of the interplay of sunlight and Earth's atmospheric conditions during an eclipse, creating a captivating and memorable sight in the night sky.

7 months ago 92 views

7:31

Above the Earth, Below the Surface: (Water Quality)

Only 3% of water on Earth's surface is fresh - a vital resource for electricity, farming, and life. As global temperatures rise, disruptions like algal blooms, glacial melt, and drought threaten our aquatic ecosystems. Safeguarding these resources is crucial, and while scientists use a variety of ground-based techniques to gauge water quality, the Landsat program has provided water quality data from orbit for decades. Here are just a few ways Landsat satellites lend us a hand when it comes to monitoring water quality.

7 months ago 39 views

44:18

LO-FI Music | Relaxing Music | Calming and Chill Song | Music for Relaxation, Working, Studying et

8 months ago 151 views

2:53