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Saint Vincent College Faculty Blog

A Summer Sky Full of Planets

Posted by John Smetanka on Wed, Jun 8, 2016 @ 11:06 AM


Three bright planets have graced the evening sky for the past month and will continue to do so throughout June and July. Jupiter, largest planet in the solar system, shines brightest in the southwestern sky just after sunset. Mars, slightly fainter but much redder than Jupiter, is rising in the southeast as the sun sets. Finally, 20 degrees (approximately two fists extended at arm’s length) further southeast Saturn appears white in comparison to Mars and the nearby bright star Antares – both red. Together, these three bright planets make excellent targets for small telescopes, binoculars or just stargazing with the unaided eye. Images of each planet taken with the College’s 14-inch telescope and planetary camera are shown above.

These three planets happen to be the three visible planets that orbit the sun at a greater distance than Earth – called the superior planets. A superior planet, every so often, will line up with the Earth and Sun. When this happens Sun earth and marsthe distance between the Earth and that planet is at a minimum. This is called opposition because the planet and the sun are 180 degrees apart, or opposite each other, on the sky. A planet in opposition will be highest in the sky at midnight – opposite the sun, which is highest in the sky at noon.

Both Mars and Saturn are at near opposition right now. Since Earth is close to these planets at the moment, they are at their brightest. If you view them through a telescope they are also at their largest apparent size. Because Mars is much closer to Earth compared to Saturn, its variation is more extreme. Thus, Mars is noticeably brighter than it normally appears. Over the next three months, Mars will fade gradually and become closer in brightness to Saturn.  

In addition to viewing these planets in the summer night sky, a variety of spacecraft exploring these worlds offer close-ups no telescope on Earth could reproduce. Launched in 2011, the Juno spacecraft  will reach Jupiter on July 4. Unlike last summer’s Pluto flyby, when the New Horizon spacecraft sped by taking pictures for a few hours, Juno will orbit Jupiter for about two years. Juno will be only the second spacecraft to orbit Jupiter – the first, Galileo, ended its mission in 2003. Cassini, the only spacecraft to orbit Saturn, is nearing the end of its mission. July 1 will mark the 12th year Cassini has been taking images of Saturn, its rings and its moons. Next year, after nearly 20 years of service, Cassini will end its mission by plunging into Saturn’s atmosphere where it will be destroyed by the extreme temperature and pressure. On the surface of Mars, the Curiosity rover continues its exploration of Gusev crater. Orbiting the red planet, a veritable armada of spacecraft are monitoring the atmosphere, mapping the surface and laying the foundation for future exploration that will include humans.

Space Missions

Our ancestors watched the planets move through the sky for thousands of years. For slightly more than 500 years, telescopes have been able to reveal the cloud bands of Jupiter, rings of Saturn and the varying apparent size of Mars at it revolves around the Sun. However, for the first time this summer, spacecraft will be simultaneously sending back new images from Jupiter, Saturn and Mars. Supplementing this summer’s sky show of all three of the visible superior planets, we can also follow the scientific explorations of these incredible worlds.

Truly, we live in a unique and exciting era of exploration and scientific discovery!

Topics: John Smetanka, astronomy, Planetarium, planets, Cassini, Curiosity, Juno, telescope

About the Authors

Michelle Gil-Montero is an associate professor of English and director of creative writing at Saint Vincent College. She runs the visiting writers series on campus, oversees the student literary magazine, and serves as guru to aspiring poets on campus. She received her MFA from the University of Iowa Writers’ Workshop in 2007, and she has been on the Saint Vincent faculty since that year. She is an active poet and literary translator from Spanish. She is spending part of the 2016-17 school year travelling to Argentina on a Howard Foundation fellowship and Fulbright grant. 

Dr. John J. Smetanka has been a member of the full-time faculty since 1997 and currently serves as the Vice President for Academic Affairs and Academic Dean of Saint Vincent College, a position he has held since January 2008. Dr. Smetanka has taught courses in Physics, Astronomy, Chemistry and Geology as well as interdisciplinary seminars. He has published scientific research articles in physics and astrophysics journals, numerous conference proceedings and also works in science education reform and the interaction between science, technology and theology.

Jim Kellam is an associate professor of biology at Saint Vincent College and our resident ornithologist. He received his Ph.D. from Purdue University in 2003, and is taking this semester as a sabbatical. What does that mean? He'll explain in his blog posts.

Dr. Michael J. Urick is Graduate Director of the Master of Science in Management: Operational Excellence program, and Associate Professor of Management and Operational Excellence at the Alex G. McKenna School of Business, Economics, and Government. Dr. Urick teaches courses related to organizational behavior, human resources, culture, leadership, diversity, conflict, supply chain, operations and research methods. Professionally, Urick serves on the board of the Institute for Supply Management (Pittsburgh) and belongs to the Society for Human Resource Management and APICS. For fun, Urick enjoys music and, since 1998, has led and performed with Neon Swing X-perience, a jazz band that has released multiple albums and toured portions of the US. He enjoys watching movies, is an avid reader of fantasy and science fiction, and also likes to fence.

David Safin, C'00, has been a lecturer in the communication department since the Fall of 2003, and has served in a variety of administrative roles since the summer of 2004. Currently, he teaches multimedia in the communication department as an assistant professor. 

Dr. Michael Krom received his Doctorate in philosophy at Emory University in 2007 and is currently the chair of the philosophy department at Saint Vincent. He has authored a book on religion and politics and continues to publish works in Catholic moral and political thought. Dr. Krom also directs the Faith and Reason summer program every summer. 

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