July 16, 2015 Page 7 Looking Up Eyeing Up Earth-Like Planets With The James Webb Space Telescope Based on press release from Royal Astronomical Society, provided by Bob Eklund Almost 2,000 exoplanets have been discovered to date, ranging from rocky Earthlike A 2015 artists’ rendering of the James Webb Space Telescope. Photo credit: Northrop Grumman. more hostile conditions such as are found on our neighboring planet Venus. JWST will have the capability to detect key markers that could indicate the presence of a climate like our own when looking at Earth-size planets around stars that are smaller and redder than our Sun. Different gases have already been identified successfully in the atmospheres of several large, hot, Jupiter-size planets by studying tiny variations in the starlight that passes through their atmospheres when they cross in front of their parent stars. However, these variations are minuscule: the light filtered through the exoplanet’s atmosphere is one ten-thousandth of the total starlight detected. Studying planets the size of the Earth is an even greater challenge. Although JWST planets to hot Jupiters, and orbiting every type of star. But how many of these distant worlds are habitable? Today’s technology means that we currently have very little information about what exoplanets are like beyond their presence, size and distance from star. With the launch of the James Webb Space Telescope (JWST, http://www.jwst. nasa.gov), we may have our first glimpses into atmospheres of Earth-like exoplanets, according to the results of a study by Dr. Joanna Barstow, presented at the British National Astronomy Meeting in Llandudno, Wales, UK, on Wednesday, July 8. “A planet’s atmosphere provides a good guide to likely conditions on the surface,” said Barstow, of the University of Oxford. “The Earth’s atmosphere contains significant amounts of nitrogen, oxygen, ozone and water. By contrast, its inhospitable ‘evil twin,’ Venus, has an atmosphere made mostly of carbon dioxide, which drives its surface temperature to a blistering 450 degrees Celsius.” A successor to the Hubble Space Telescope, JWST is due for launch in 2018 and will study the universe in infrared wavelengths. Barstow’s study shows that JWST may be able to differentiate between a planet with a clement, Earth-like atmosphere, and one with would struggle with analyzing a solar system exactly like our own, it would be capable of studying Earth-like planets around cooler stars—if such a system were to be found. “If we took the Earth and Venus, and placed them in orbit around a cool, red star that’s not too far away, our study shows that JWST could tell them apart. Earth’s ozone layer, 10 kilometers above the surface, is produced when light from the Sun interacts with molecules of oxygen in our atmosphere, and it produces an unmistakable signal that could be detected by JWST. Venus, without a substantial ozone layer, would look very different,” said Barstow. “That’s assuming that planets starting out like Earth and Venus would evolve in the same way around a cool star!” However, JWST will be used for a wide range of astronomical applications, not just detecting exoplanets, and securing time on the telescope will be highly competitive. To make these detections, astronomers would need to observe the exoplanets at least 30 times, taking valuable telescope time. “Future telescopes that are dedicated to observing the atmospheres of many rocky planets around different stars will be required to fully resolve the question of habitability on exoplanets. In the meantime, JWST will observe many other weird and wonderful planets in unprecedented detail,” said Barstow.• C e r t i f i e d a n d L i c e n s e d P r o f e s s i o n a l s painting PAINTERS PLUS INTERIOR • EXTERIOR PLUS IMPROVEMENTS • REPAIRS FREE ESTIMATES LOWEST PRICES • GUARANTEED QUALITY 5 YEAR FREE MAINTENANCE SERVING THE BEACH CITIES FOR OVER 20 YEARS CALL DON 310-798-0450 LIC # 726089 painting RICH’S PAINTING Specializing in exterior Quality interior work Reliable • Reasonable Rates 310-640-9465 plumbing 24 Hour Service Since 1990 • Lic # 770059 • C-42 C-36 C-34 C20 A Full Service Plumbing • Heating • Cooling Sewer Video Inspection • Rooter Service • Copper Repipes 310-543-2001 Free Estimates PLUMBING, HEATING & COOLING KEEP IT LOCAL NEW LOWER RATES! 26 weeks (6 months) is only $400 52 weeks (1 year) is only $750 If you have any questions call us at 310-322-1830. HOW TO PAY: CHECKS, CASH OR CREDIT CARDS. 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