Aerosols are the tiny particles of liquids and material that float around in our environment. When they come from an infected person, they may be a significant source of coronavirus transmission. The science of infectious aerosols.

It's nature with a much-decreased human influence. We've been hearing stories like this from all around the globe. People in India’s northern state of Punjab have reported seeing the Himalayas for the first time in decades. These satellite images over northern India show strikingly how aerosol levels have dropped since the Covid-19 lockdown began.

From Earth Day Network India … Dharti Ma literally translates to Mother Earth. This music video is a tribute to our planet, created In an amalgamation of styles by some of the finest musicians of India - and in 8 languages - to commemorate Earth Day’s 50th anniversary.

The Hubble Space Telescope was launched on April 24, 1990. It's spent the past 3 decades acquiring magnificent images of distant space objects, providing a time machine that's taken astronomers back to when the universe was less than a billion years old.

Understanding isolation's effects on regular people, rather than those certified to have 'the right stuff,' will help prepare us for the future, whether another pandemic or interplanetary space travel.

Today is the 50th anniversary of Earth Day, which catalyzed action to protect the environment, not just in the US but internationally.

On April 19, 2020, many in western Europe were stunned to spot a line of satellites crossing the night sky. They were the SpaceX Starlink satellites.

The NASA Curiosity mission team is keeping the rover moving and working on the surface of Mars while they #stayathome. Find out how they’re managing it.

Click here for links to activities for International Dark Sky Week, April 19 to 26, 2020.

Fascinating video! Tour the International Space Station with ESA astronaut Luca Parmitano and NASA astronaut Drew Morgan. Shot in one take with two cameras strapped together.