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.

Look west after sunset to behold dazzling Venus, the sky's brightest planet shining at her brightest best in the evening sky!

The moon is sweeping past Venus on these late April 2020 evenings. The EarthSky Community is catching them, and sharing their photos. Thanks to all who submitted.

LIGO and Virgo detectors have now captured the first gravitational waves from a binary black hole merger where the black hole masses are unequal.

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.

Fomalhaut b was thought to be one of the few exoplanets photographed so far, but new observations from the Hubble Space Telescope show it's really an expanding dust cloud.

After the sun sets on April 24-26, 2020, look west for the waxing crescent moon near the brightest planet in Earth's sky, Venus.

The first known interstellar comet - 21/Borisov - probably came here from a red dwarf star, according to a new study of data from the Hubble Space Telescope.