NASA’s Hubble: Amazing Stellar Dance

The NASA/ESA Hubble Space Telescope offers this wonderful view of the crowded astral encampment called Messier 68, a spherical, star-filled region of space known as a circular cluster. Mutual gravitational attraction amongst a cluster’s hundreds of thousands or even millions of stars keeps stellar members in check, allowing globular clusters to hang together for many billions of years. More than 150 of these objects surround our Milky Way galaxy.

On a galactic scale, globular clusters are indeed not all that big. In Messier 68's case, its constituent stars span a volume of space with a diameter of little more than a hundred light-years. The disc of the Milky Way, on the other hand, extends over some 100,000 light-years or more. Astronomers can measure the ages of globular clusters by looking at the light of their constituent stars.

Hubble added Messier 68 to its own impressive list of cosmic targets in this image using the Wide Field Camera of Hubble's Advanced Camera for Surveys. The image, which combines visible and infrared light, has a field of view of approximately 3.4 by 3.4 arc minutes

Nasa is in High Term to Develope Atlantic Row

After a Tropical low pressure, NASA's Aqua satellite spotted some very cold, high, thunderstorms around the center of a tropical low pressure area in the Atlantic Ocean today, indicating that the system is getting stronger,organized and developed.

In that low pressure area, designated as system 99L was located about 850 miles east of the southern Windward Islands  near 10.7 north latitude and 46.9 west longitude then it was moving west between 15 and 20 mph.

The Aqua Satellite's  Atmospheric Infrared Sounder (AIRS) instrument captured an infrared image of the storm. It showed that there was a small area of strong, high, cold cloud tops of thunderstorms around the center of circulation, indicating some strength in the low pressure area. Infrared imagery shows temperature and the higher the cloud tops, the colder they are as they reach higher in the troposphere (lowest atmospheric layer). When cloud top temperatures are very cold, it's an indication of strong uplift in the atmosphere. The cloud top temperatures around the center of this low were near -63 Fahrenheit (-52 Celsius), and indicated powerful uplift and high cloud tops.