Spitzer space telescope legacy

Date:
October 9, 2020
Source:
University of Central Florida
Summary:
Scientists have provided an inventory of the major discoveries
made possible thanks to Spitzer and offer guidance on where the
next generation of explorers should point the James Webb Space
Telescope (JWST) when it launches in October 2021.



FULL STORY ==========================================================================
To understand the significance of the Spitzer Space Telescope on the understanding of our solar system, think of what the steam engine meant
for the industrial revolution.


==========================================================================
A national team of scientists today published in the journal Nature
Astronomy two papers that provide an inventory of the major discoveries
made possible thanks to Spitzer and offer guidance on where the next
generation of explorers should point the James Webb Space Telescope
(JWST) when it launches in October 2021.

"The Spitzer Space Telescope made many important discoveries in the solar system during its 16 year-long mission, and it is important to capture
the highlights of these with useful references for future scientists
to use in their research," says Carey M. Lisse, from the Johns Hopkins
Applied Physics Lab, lead author of one paper.

Lisse, a planetary astronomer, put together the team of 27 authors
who penned the legacy papers. The authors were selected based on the significant discoveries they made using Spitzer during its 16-year
mission. The team includes three University of Central Florida
researchers, who offer suggestions for the next space telescope mission.

David Trilling, a planetary scientist and professor at Northern Arizona University, is the lead author on the second paper.

When Spitzer launched in 2003 it contained infrared detectors of
unprecedented sensitivity, providing astronomers a never-before-possible
look at the universe. Thanks to observations by Spitzer over the years, scientists gained new insights into, for example, the composition of
comets, the icy surfaces of cold, distant bodies beyond Neptune, the
heat radiation given off by asteroids, the extent of free-floating dust
in the inner solar system, and the composition and properties of the atmospheres of Uranus and Neptune. Spitzer even managed to discover a
new ring of Saturn! The much-delayed JWST, which will likewise study the infrared cosmos, is expected to build on the extensive results provided by Spitzer, including taking the next step in our study of the solar system.



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UCF Professor Yan Fernandez, who specializes in comets, said the papers
include some of the projects he is most proud off in his career. Fernandez
is a co- author on both papers.

"I think these papers demonstrate the return on investment for Spitzer," Fernandez said. "These space telescopes are taxpayer-funded, after
all. More philosophically, Spitzer has brought us closer to those big
questions about why the solar system and Earth are here in the first
place. Spitzer was not only great for the solar system, but it was great
for studying exoplanets, great for studying planet formation, and great
for studying star formation. All important to understand why our solar
system turned out the way it did." Noemi' Pinilla-Alonso said astronomy
is based on patience and collaboration.

She studies Trans-Neptunian Objects at UCF's Florida Space Institute and contributed to the paper alongside institute post-doctoral scholar Estela Ferna'ndez-Valenzuela. Pinilla-Alonso is among a handful of scientists
already guaranteed time on JWST once it is place. She is part of the
team that will be calibrating the instrument from the ground.

"Answering one question takes the effort of multiple scientists or
groups, each of them with a unique set of skills," Pinilla-Alonso
says. "My contribution to this work is to provide the basic recipe of
which ingredients are needed to build or cook an icy body in the solar
system. And this is a key piece of information that is needed to answer questions such as how did the solar system form? How has it evolved to
its actual state? How similar or different is our solar system from
the long list, more than 3,000, of exoplanetary systems discovered?" Fernandez-Valenzuela also studies Trans-Neptunian Objects and earlier
this year held workshops to help scientists prepare successful proposals
to obtain time on the JWST once NASA opens up the process.

"This work has helped us to understand what we could do with Spitzer
data and how to use the JWST capabilities to shed light on issues that
Spitzer could not answer," Ferna'ndez-Valenzuela says.

"Using Spitzer we have been able to detect specific materials that were impossible to detect from ground-based telescopes, due to the atmosphere,
or using the Hubble Space Telescope," Ferna'ndez-Valenzuela says. "Now
with JWST we will be able to obtain information on much fainter objects
than is currently possible. I'm eager for that day as it will be a very important milestone for this research area. It will provide much more information on the formation of the outer solar system." Spitzer was
turned off in January 2020, 11 years beyond its prime mission.

"Spitzer was sensitive to infrared radiation, as opposed to visible
light," Trilling says. "In many ways, Spitzer provided a view of the
universe and of planetary bodies in our solar system that scientists
had never seen before.

This technological revolution produced new insights into the formation
and evolution of our Solar System."

========================================================================== Story Source: Materials provided by
University_of_Central_Florida. Original written by Zenaida Gonzalez
Kotala. Note: Content may be edited for style and length.


========================================================================== Journal References:
1. Carey Lisse, James Bauer, Dale Cruikshank, Josh Emery, Yanga
Ferna'ndez,
Estela Ferna'ndez-Valenzuela, Michael Kelley, Adam McKay, William
Reach, Yvonne Pendleton, Noemi Pinilla-Alonso, John Stansberry,
Mark Sykes, David E. Trilling, Diane Wooden, David Harker, Robert
Gehrz, Charles Woodward. Spitzer's Solar System studies of comets,
centaurs and Kuiper belt objects. Nature Astronomy, 2020; 4 (10):
930 DOI: 10.1038/s41550- 020-01219-6
2. David E. Trilling, Carey Lisse, Dale P. Cruikshank, Joshua P. Emery,
Yanga Ferna'ndez, Leigh N. Fletcher, Douglas P. Hamilton, Heidi B.

Hammel, Alan W. Harris, Michael Mueller, Glenn S. Orton, Yvonne J.

Pendleton, William T. Reach, Naomi Rowe-Gurney, Michael Skrutskie,
Anne Verbiscer. Spitzer's Solar System studies of asteroids,
planets and the zodiacal cloud. Nature Astronomy, 2020; 4 (10):
940 DOI: 10.1038/s41550- 020-01221-y ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2020/10/201009094948.htm

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