A new spacecraft proposed by scientists at CU Boulder could soon be NASAs nose in space, sniffing out the environments beyond Earths solar system that might host planets with thick atmospheres.
Astrophysicist Kevin France is leading the development of that mission, called the Extreme-ultraviolet Stellar Characterization for Atmospheric Physics and Evolution (ESCAPE). Hes hoping it will provide the critical reconnaissance work in humanitys search for life far away from home.
NASA and the entire astronomical community have made the search for signs of life on exoplanets a priority, said France, an assistant professor in the Laboratory for Atmospheric and Space Physics (LASP) and the Department of Astrophysical and Planetary Sciences (APS). We believe that detectable life outside the solar system probably relies on the presence of an atmosphere.
This month, the space agency gave him and his colleagues an important go-ahead to start the hunt for habitable environments: ESCAPE will be one of two candidates vying to be the next satellite to launch under NASAs ambitious Explorers Program.
A concept design for theExtreme-ultraviolet Stellar Characterization for Atmospheric Physics and Evolution (ESCAPE) spacecraft in an alien star system. (Credit: Brandy Coons/Laura Murray/CU Boulder)
If selected, the mission, which would have a budget of no more than $145 million, could pack a lot of scientific punch for the cost.
These promising proposals under the Explorers Program bring out some of the most creative, innovative ways to help uncover the secrets of the universe," said Thomas Zurbuchen, associate administrator of NASAs Science Mission Directorate, in a statement. "From studying stars and planets outside our solar system to seeking answers to the largest cosmic mysteries, I look forward to the breakthrough science from these modest size missions.
The proposed mission, a joint effort of LASP, JILA and the Center for Astrophysics and Space Astronomy (CASA) at CU Boulder, wouldnt seek out exoplanet atmospheres directly. Instead, ESCAPE would take a close look at distant stars.
Allison Youngblood, a research scientist at LASP, explained that some stars probably dont make good homes for habitable planets. In particular, stars that spit out a lot of high-energy radiationin this case, extreme ultraviolet lightcan strip the atmospheres away from orbiting worlds. Think of it like a strong gust blowing through a pile of leaves.
This high-energy radiation is absorbed in the highest layers of a planet's atmosphere and regulates the escape of an atmosphere to space, said Youngblood, part of Frances ESCAPE team. We must measure the extreme ultraviolet radiation from exoplanet host stars to be able to say whether or not exoplanets can hang on to their atmospheres.
Over the course of its proposed two-year mission, which could begin in 2025, ESCAPE would survey the radiation streaming from more than 200 stars.
By doing that, France hopes to narrow down the list of the spots where scientists might expect to find the signals of flourishing life.
Were going to be able to make a road map of the most promising habitable worlds that NASA will spend its resources studying over the next 20 years, France said.
For now, he and his colleagues are buckling down. NASA has given the team $2 million dollars to develop their concept for ESCAPE further, and the agency will make its final decision in 2021.
The teams vision is definitely ambitious, France said. ESCAPE would measure about 7-feet-long and weigh more than 300 poundsa roughly Shaquille ONeal-sized chunk of machinery in low-Earth orbit.
ESCAPE also makes use of a new type of telescope designone that would be capable of measuring the faint extreme-ultraviolet radiation from distant stars, data that astronomers have so far not been able to collect.
Over the next nine months, were going to be making and testing engineering models of some of the more critical parts of the system in order to demonstrate that our design is actually going to perform as well as we think its going to, said Brian Fleming, a research professor at LASP and the instrument scientist for ESCAPE.
In other words, the researchers have some busy months ahead of them.
We were extremely excited when we found out we were selected, France said. Then maybe a day later it hit us that, Oh my gosh, we actually have to do all this. Its very gratifying to see it all come together and for NASA to be excited about it.
Other CU Boulder members of the ESCAPE team include Zachory Berta-Thompson and Adam Kowalski, assistant professors in APS; James Green, a professor in APS; and Jeffrey Linksy of JILA; and James Mason and Nick Kruczek, research scientists at LASP. Tom Patton leads the projects engineering team at LASP.
The effort also brings together researchers from the Ball Aerospace, Southwest Research Institute, and the National Solar Observatory, based in Boulder. ESCAPE also has science and technical partners at NASAs Marshall Space Flight Center and numerous other universities and science institutions around the world.
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