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Why Does the Moon Look Larger at the Horizon? We Asked a NASA Scientist: Episode 50

2 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater)

We’ve been talking about this for 2,000 years. Aristotle mentions it. And in our own time, scientists are designing experiments to figure out exactly what’s going on. But there’s no consensus yet.

Here’s what we do know.

The atmosphere isn’t magnifying the Moon. If anything, atmospheric refraction squashes it a little bit. And the Moon’s not closer to us at the horizon. It’s about 1.5 percent farther away. Also, it isn’t just the Moon. Constellations look huge on the horizon, too.

One popular idea is that this is a variation on the Ponzo illusion. Everything in our experience seems to shrink as it recedes toward the horizon — I mean clouds and planes and cars and ships. But the Moon doesn’t do that. So our minds make up a story to reconcile this inconsistency. Somehow the Moon gets bigger when it’s at the horizon. That’s one popular hypothesis, but there are others. And we’re still waiting for the experiment that will convince everyone that we understand this.

So why does the Moon look larger on the horizon? We don’t really know, but scientists are still trying to figure it out.

[END VIDEO TRANSCRIPT]

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NASA’s Planetary Defenders Head to the Sundance Film Festival

Trailer for NASA’s upcoming documentary, “Planetary Defenders,” which will take audiences inside the high-stakes world of asteroid hunting and planetary defense.

NASA is bringing the high-stakes world of planetary defense to the Sundance Film Festival, highlighting its upcoming documentary, “Planetary Defenders,” during a panel ahead of its spring 2025 premiere on the agency’s streaming service.

“We’re thrilled that NASA is attending Sundance Film Festival for the first time – a festival renowned for its innovative spirit,” said Brittany Brown, director, NASA Office of Communications Digital and Technology Division, at the agency’s Headquarters in Washington. “Our participation represents a groundbreaking opportunity for NASA to engage with the film industry and share new avenues for collaborative storytelling. By connecting with the creative minds at the festival, we aim to inspire new narratives, explore new avenues for collaborative storytelling, and ignite a renewed sense of wonder in space exploration.”

The NASA+ film explores a compelling question: How would humanity respond if we discovered an asteroid headed for Earth? Far from science fiction, “Planetary Defenders” follows real-life astronomers and other experts as they navigate the challenges of asteroid detection and safeguarding our planet from potential hazards.

“NASA is home to some of the greatest stories ever told, and NASA’s new streaming platform NASA+ is dedicated to sharing these stories to inspire the next generation,” said Rebecca Sirmons, general manager and head of NASA+. “We are honored to host a panel at this year’s Sundance Film Festival discussing our upcoming NASA+ documentary “Planetary Defenders.”

The panel, entitled “You Bet Your Asteroid: NASA Has a Story to Tell,” will start at 1:30 p.m. MST on Sunday, Jan. 26, at the Filmmaker Lodge in the Elks Building, 550 Main St., 2nd Floor, Park City, Utah. The event will include a discussion about the film followed by a Q&A session. Attendees also will have the opportunity to meet NASA experts and some of the planetary defenders themselves.

Panelists include:

  • Rebecca Sirmons, head of NASA+, NASA
  • Scott Bednar, filmmaker and director, NASA 360/National Institute of Aerospace
  • Jessie Wilde, filmmaker and director, NASA 360/National Institute of Aerospace
  • Dr. Kelly Fast, acting planetary defense officer, NASA’s Planetary Defense Coordination Office
  • David Rankin, senior survey operations specialist, Catalina Sky Survey
  • Dr. Vishnu Reddy, professor of planetary sciences and director of the Space4 Center, University of Arizona

Media are encouraged to RSVP in advance and may request one-on-one interviews with NASA experts following the panel by contacting Karen Fox at karen.c.fox@nasa.gov.

Through NASA+, the agency is continuing its decades long tradition of sharing live events, original content, and the latest news while NASA works to improve life on Earth through innovation, exploration, and discovery for the benefit of all. The free, on-demand streaming service is available to download without a subscription on most major platforms via the NASA App on iOS and Android mobile and tablet devices, as well as streaming media players like Roku, Apple TV, and Fire TV.

To keep up with the latest news from NASA’s planetary defense program, visit:

https://www.nasa.gov/planetarydefense

-end-

Abbey Donaldson
Headquarters, Washington
202-358-1600
abbey.a.donaldson@nasa.gov

NASA Workshops Culturally Inclusive Planetary Engagement with Educators

2 min read

NASA Workshops Culturally Inclusive Planetary Engagement with Educators

From November 6-8, 2024, the NASA Science Activation Program’s Planetary Resources and Content Heroes (ReaCH) project held a Culturally Inclusive Planetary Engagement workshop at the Bradley Observatory at Agnes Scott College in Atlanta, Georgia for the space sciences community, including planetary science, astrobiology, astronomy, and heliophysics professionals, as well as invited education specialists. To practice the skills learned in the workshop, participants facilitated a variety of space-themed, culturally-inclusive, hands-on activities for 79 students, family, and staff at the Center for a New Generation at the Tuskegee Airmen Global Academy Boys and Girls Club.

Workshop participants provided anonymous feedback as a part of their workshop evaluations:

“[This experience] helped me learn a lot about how to make different cultures and ethnicities feel involved and included and also engage with them to inspire in them a love for science”

“. . .I feel like the discussions were so important to me, considering we all come from so many different backgrounds, and our exposure has been different, so we all have a different point of view to bring to the discussion that others, that I, might not think of right away. So I think it was really nice to hear so many different perspectives in all of these discussions.”

“[The facilitator] connected cultural diversity to an activity. That is not easy to do. I loved it and it is what I expected coming into this workshop.”

This workshop was conducted in partnership with Agnes Scott College, Georgia Tech, the Boys & Girls Clubs of Metro Atlanta, and members of the Center for Lunar Environment and Volatile Exploration Research (CLEVER) NASA Solar System Exploration Research Institute (SSERVI) Center. ReaCH workshops are designed to enhance the ability of scientists to engage their local communities in science. The Planetary ReaCH project is building a replicable model that will be used to support similar workshops for other science fields. NASA-funded researchers, including early-career scientists, are invited to apply for the 2025 workshops!

The Planetary ReaCH project is supported by NASA under cooperative agreement award number 80NSSC21M0003 and is part of NASA’s Science Activation Portfolio. Learn more about how Science Activation connects NASA science experts, real content, and experiences with community leaders to do science in ways that activate minds and promote deeper understanding of our world and beyond: https://science.nasa.gov/learn

A large group of people varying in appearance are posing for the camera, smiling; most are holding red folders with the graphic of an open hand with a planet above it.
The workshop was attended by researchers including early career scientists, planetary scientists, astrobiologists, astronomers, heliophysicists, and education specialists.
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