Brian Lera on WNYC.

Earlier this month, NASA's Artemis 2 mission gave us a stunning new image of our planet.

Did you see it?

In some ways, it was a familiar image because it recreated

the iconic blue marble photograph from the 1972 Apollo 17 mission. That image was one of the first

clear shots of the planet fully lit from way out there. Along with NASA's 1968 photo Earthrise, the images from space became powerful

symbols for the environmental movement, according to NASA itself. Here on Earth Day, we remember

this year's image from the Artemis II mission is titled, Hello World, and it looks different in comparison to the original,

as has been noted with concern online.

Hello World looks a bit dingier.

Viewers have noted, the color seem muddier, leading many to speculate that it was because

of climate change.

Well, in terms of the color difference, it's likely due to 50 years of technological

advancements in photography.

Others say, but NASA is one of the global leaders in studying Earth's changing climate.

Turns out that vantage point can tell us a lot.

So on this Earth Day, we're joined again by Jackie Faradie, astrophysicist and

science educator at the American Museum of Natural History with an astrophysicist's view of Earth Day.

Jackie, so good to have you again. Welcome back to WNYC. Hi, Brian. I love coming on your show.

And I'll remind listeners we had you on just earlier this month to tell us about the mission of Artemis II, but we didn't talk about Hello World or the other images from that mission so much.

So just to recap, can you describe Hello World and what your reaction was to seeing it?

Yeah, Hello World was an image that the commander Reed Wiseman sent back, and NASA uploaded.

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