Screenshot of the Erdas Imagine interface: on the left is a false color image showing water bodies (blue/dark) and healthy vegetation as red. On the right is a processed image for daily ET, where pixels with higher ET having a lighter color, for example the water bodies and the irrigated fields.

A view from Space: using satellites to manage water

by Mcebisi Mkhwanazi For decades, satellite imagery has been used for environmental monitoring, with water management being one of the areas of application. For example, many are familiar with the Landsat images showing Lake Chad in Africa shrinking over the years. Now satellites are used for more than just providing visual images. This paper discusses…

Figure 3: This image shows an artistic view of NASA’s Deep Space 1 probe with its ion engine firing. Photo credit: NASA.

Plasmas: Beyond your TV screen and into space

by Carmen Guerra García Plasmas are known as the fourth state of matter, the first three states being gases, liquids and solids. Whereas everyone can distinguish the first three states, plasmas are in general less known to most people, even though most of the known universe is made of plasmas! Plasmas are similar to gases…

This Image of Tatooine taken from the movie Star Wars clearly shows that the planet orbits a binary system of stars. Kepler-16b resembles this planet in size and also orbits a bright sun-like star and dimmer red dwarf.

Exoplanets today: When reality surpasses fiction

by Eduardo Bendek. The existence of planets outside of our solar system, or exoplanets, has been envisioned since early times. In fact, the Greek philosopher Epicurus proposed the idea for the first time on one of his letters to Herodotus 300 B.C. He said, “There are an infinite number of worlds, some like this world,…