Amy Mainzer Is Hunting Asteroids With NEOWISE

Episode Summary

Executive Summary: This Planetary Radio episode revisits the Planetary Society’s outreach legacy, explains why Europa and Enceladus matter as prime targets in the search for life, and spotlights NEOWISE’s successful return from hibernation to resume hunting near-Earth objects. The show closes with Bruce Betts’ sky guide, focusing on Venus, Jupiter, Mars, and the year’s trivia challenge.

Main Topics: Red Rover Goes to Mars reunion: Emily Lakdawalla reflects on reuniting with former student astronauts from the Mars Exploration Rover outreach program, emphasizing how the experience shaped their scientific careers and raised space science awareness internationally. Why Europa and Enceladus matter: Bill Nye argues that finding life on moons like Europa or Enceladus would be transformative for science, society, and medicine, reinforcing the Planetary Society’s mission to build excitement around exploration. NEOWISE’s return from hibernation: Amy Meinzer describes the revived WISE spacecraft’s successful wake-up and early performance as NEOWISE, with all subsystems healthy and images matching pre-hibernation quality. Infrared asteroid detection and characterization: The conversation explains why infrared observations are superior for determining asteroid size and reflectivity, enabling better estimates of composition and population statistics. NEOCAM and future asteroid surveys: Meinzer outlines the proposed next-generation Near Earth Object Camera, designed with new detectors and a better thermal configuration to survey more of the sky for years. Night sky and 2014 astronomy highlights: Bruce Betts covers Venus’ crescent phase, Jupiter at opposition, Mars, Saturn, and the Quantronids meteor shower, while also recalling the 10th anniversary of Spirit’s Mars landing.

Key Arguments: Outreach programs can have long-term global impact: the former student astronauts are now in science/technology careers and were celebrities in their home countries. Europa and Enceladus are especially important because subsurface oceans make them plausible habitats, and a life detection would change how humanity understands its place in the universe. Repurposing WISE into NEOWISE is cost-effective and scientifically productive because an existing spacecraft can continue delivering high-value asteroid data. Infrared astronomy is better than visible light for asteroid work because thermal emission is less dependent on reflectivity and gives a more direct estimate of size. NEOWISE has already found many previously unknown objects, but a dedicated next-generation survey mission like NEOCAM is still needed for more complete near-Earth object detection. Ground-based amateur follow-up remains essential because survey discoveries must be refined to secure orbits and maintain object tracks over time.

Data Points: Student astronauts: 16 - Number of high school participants in Red Rover Goes to Mars Continents represented: 5 - Student astronauts came from five continents Near-Earth object mission hibernation duration: About 31 months - Time WISE/NEOWISE spent asleep before reactivation Asteroids and comets observed: About 158,000 - Total objects observed by the mission so far New objects discovered: About 34,000 - Previously unknown objects identified from WISE data Near-Earth objects observed: Around 700 - NEOWISE detections across mission phases Large near-Earth objects found: More than 90% - Completeness for objects larger than 1 kilometer across 100-meter near-Earth objects discovered: About 25% - Estimated discovery fraction for football-field-sized objects 20-meter near-Earth objects discovered: About 1% - Estimated discovery fraction for very small objects like the Chelyabinsk impactor WISE cryogenic lifetime: About 8.5 months - Duration solid hydrogen cooling lasted for the original mission Venus event date: January 11 - Inferior conjunction mentioned in the sky report Jupiter event date: January 5 - Jupiter at opposition Mars event date: January 2 - Mars peaks in the middle of the night

Pivotal Quotes: "If we were able to make a discovery there, let's say, of evidence of life, it would utterly change the world." — Bill Nye: Explaining why Europa and Enceladus are such important targets "It's basically like Christmas and my birthday, and it was all both into one." — Amy Meinzer: Describing the emotional reaction to NEOWISE’s successful revival "This is sort of the ultimate in recycling in some sense." — Amy Meinzer: Characterizing the reuse of the WISE spacecraft as NEOWISE

Implications: The episode underscores that space outreach, asteroid defense, and astrobiology are interconnected: public inspiration, better survey technology, and persistent follow-up all matter for planetary science and risk reduction.