With less than a week away from the solar eclipse, weather forecasters are keeping an eye on the cloud cover, which can make or break a person's chance to see the event.

Different types of clouds have different effects on a person's viewing experience. When the moon completely covers the sun April 8, it will be the first total eclipse in North Texas since 1878.

Generally, clouds are divided based by their height: low-level, mid-level and high-level.

What are stratus clouds?

The type of clouds does depend on the system, which is the movement of warm and cold air. But in the springtime, there's a good chance the Dallas-Fort Worth area gets many stratus clouds, said Monique Sellers, a meteorologist with the National Weather Service in Fort Worth. They are low-level cloud layers that sometimes appear as ragged sheets, per the National Oceanic and Atmospheric Administration.

Multiple layers of clouds are possible in the area, she said, but most times, lower cloud decks are observed locally. In North Texas, Sellers said, the altitude of the layers don't vary as much: lower clouds can vary anywhere from 1,500 feet to 6,000 feet in the air, mid-level clouds are anywhere between 6,500 to 23,000 feet up and high-level clouds are anything above that.

The upper-stage helium tank of the Ariane 3 that was launched in 1985 was recovered in Uganda in 2002 after re-entry. Molten aluminum splashes were discovered on the tank, which have been identified as deposits from local fixings.

The ESA and CNES (French Government Space Agency) want to further investigate how the splashes were caused and the potential effects on titanium and stainless steel materials by recreating, for the first time, this extreme environment and re-entry scenario on the lab scale.

Dr. Yunus Azakli, Engineering Lead for Materials Discovery and Prototyping, adapted the Arcast SC100 at the Royce Discovery Center, Sheffield, to drop molten aluminum on to sheets of Ti-6Al-4V and 316L that had been heated by a specially designed mini furnace to recreate the Ariane 3 materials found in 2002 following its re-entry.

The conditions during atmospheric Earth re-entry of spacecraft can cause some aluminum alloy parts to melt and deposit onto other metallic components. The interaction of such ejecta with titanium components such as helium pressure tanks has, so far, not been widely researched and there is uncertainty on the surface reactions during re-entry.