For Earth Day 2021 (April 22), NASA highlights science and technology that is helping us live more sustainably on our home planet and adapt to natural and human-caused changes. Here's how to participate.

Here are the dates of all solar and lunar eclipses in the year 2021. Is there one you can see? The next one is a total lunar eclipse, coming up in May.

The Mars helicopter - named Ingenuity - successfully flew in the thin air of Mars early in the day on Monday, April 19. Images here.

Some lucky skywatchers in Southeast Asia saw the moon pass in front of Mars on Saturday, April 17, 2021. Check out these images from EarthSky readers!

Northrop Grumman said last week that its Mission Extension Vehicle 2 - a robot spacecraft designed to help prolong the life of satellites in space - successfully docked to a commercial communications satellite. "We are now the only provider of life extension services for satellites," a company spokesperson said.

Spiders are master builders, expertly weaving strands of silk into intricate 3D webs. Now, scientists report they have translated the complex structure of a web into music. Listen here.

An entomologist explains why it's a good idea to be nice to the spiders you encounter and consider a live-and-let-live policy.

During its final flyby this month, the spacecraft OSIRIS-REx took an image of the location where it collected a sample from asteroid Bennu's surface. It'll return to Earth 2 years from now, providing scientists with clues to the creation of our solar system.

Jupiter's large size and cool core make it an excellent target in the search for dark matter. A team of scientists is analyzing gamma-ray data from the Fermi Telescope looking for signs of the elusive substance.

An ancient people with a sweet tooth - the Nok culture of sub-Saharan Africa - used terracotta pots to hold honey 3,500 years ago. They may be the earliest confirmed honey collectors in Africa.