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Is there such a thing as earthquake season?

Posted by Kelly Kizer Whitt in Earth | 10 hours ago

Researchers have found a connection between earthquakes in Taiwan and its dry and rainy seasons.

Martin Rees and Frederick Lamb on humanity’s fate

Posted by Kelly Kizer Whitt in Earth | Human World | 16 hours ago

From nuclear weapons to biowarfare to cyberattacks, humanity has much to overcome. Martin Rees and Frederick Lamb discuss the obstacles we must face as we look forward to humanity’s future on Earth.

Saving a humpback whale

Posted by Eleanor Imster in Earth | Human World | 17 hours ago

Take 3 minutes to watch a feel-good video of a team of responders saving a humpback whale in distress.

Why is Earth Day on April 22?

Posted by Deborah Byrd in Earth | Human World | 18 hours ago

April 22 is the date of Earth Day in part because of Arbor Day, an earlier observance. The focus of Earth Day 2021 is ‘Restore Our Earth.’

Watch rescheduled SpaceX-NASA Crew-2 launch April 23

Posted by Lia Rovira in Human World | Space | 1 day ago

The launch of Crew-2, the 2nd flight of this particular Crew Dragon, is now scheduled for Friday (April 23). The SpaceX Falcon 9 rocket will blast off at 5:49 a.m EDT from the Kennedy Space Center in Florida. How to catch the action.

New Horizons passes milestone distance 50 AU

Posted by Kelly Kizer Whitt in Space | 2 days ago

On April 17, 2021, the New Horizons spacecraft passed 50 astronomical units – 50 times Earth’s distance from the sun – while speeding toward interstellar space. It also captured an image of another earthly spacecraft, even farther out.

How many Tyrannosaurus rex lived on Earth?

Posted by EarthSky Voices in Earth | 3 days ago

During 2.4 million years of existence, a total of 2.5 billion Tyrannosaurus rex lived on Earth, and 20,000 individual animals would have been alive at any moment, according to new calculations.

Celebrate Earth Day 2021 with NASA

Posted by Eleanor Imster in Earth | Human World | 3 days ago

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.

What are Lunar X and Lunar V?

Posted by Deborah Byrd in Astronomy Essentials | 3 days ago

Is Lunar X a sign of an alien visitation? No. It’s an example of how lighting and topography can combine to produce a pattern that seems familiar to the human eye.

2021 Lyrid meteor shower: All you need to know

Posted by Bruce McClure and Deborah Byrd in Astronomy Essentials | Tonight | 3 days ago

The Lyrids are an Earth Day meteor shower, peaking on the morning of April 22. Also, try the next morning, April 23. The moon is waxing – staying out longer after dark each night – so you’ll want to watch the time of moonset carefully.

Dates of lunar and solar eclipses in 2021

Posted by Bruce McClure in Astronomy Essentials | 3 days ago

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.

It flew! Mars helicopter takes to the air

Posted by Lia Rovira in Space | 3 days ago

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

For the 2nd time, Northrop Grumman catches a satellite in Earth orbit

Posted by Lia Rovira in Space | 5 days ago

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.

Tonight

Today's Image

Tonight

Find Hercules between 2 bright stars

Find Hercules between 2 bright stars

2021 Lyrid meteor shower: All you need to know

Moon and Gemini stars on April 18 and 19

In mid-April, look west after sunset for Mars and the moon

Space

New Horizons passes milestone distance 50 AU

Watch rescheduled SpaceX-NASA Crew-2 launch April 23

New Horizons passes milestone distance 50 AU

It flew! Mars helicopter takes to the air

For the 2nd time, Northrop Grumman catches a satellite in Earth orbit

Before-and-after of asteroid Bennu's sample site

Is Jupiter a key to finding dark matter?

Yellowballs offer insights into star formation

Martian hill named to honor Curiosity scientist

Astro Essentials

2021 Lyrid meteor shower: All you need to know

What are Lunar X and Lunar V?

2021 Lyrid meteor shower: All you need to know

Dates of lunar and solar eclipses in 2021

How to take photos of star trails

Earth

How many Tyrannosaurus rex lived on Earth?

Is there such a thing as earthquake season?

Martin Rees and Frederick Lamb on humanity's fate

Saving a humpback whale

Why is Earth Day on April 22?

How many Tyrannosaurus rex lived on Earth?

Celebrate Earth Day 2021 with NASA

Listen to a spiderweb

A case against killing spiders

Human World

Celebrate Earth Day 2021 with NASA

Martin Rees and Frederick Lamb on humanity's fate

Saving a humpback whale

Why is Earth Day on April 22?

Watch rescheduled SpaceX-NASA Crew-2 launch April 23

Videos

Listen to a spiderweb

Saving a humpback whale

Listen to a spiderweb

Before-and-after of asteroid Bennu's sample site

Astronaut Soichi Noguchi sets a new space record

Hubble spots double quasars in merging galaxies

Scientists detect X-rays from Uranus

Interstellar visitor Borisov could be 1st truly pristine comet yet seen

Billions of Brood X cicadas set to emerge in spring 2021