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Rowan Introduction to AstronomyActivity #9: Smartphone Astronomy withStar ChartName: _Stephen OseiScore:AcknowledgementThis activity is adapted from exercises created by Dr. John Herrmann.ObjectiveStudents learn to employ the power of their smartphones to explore the sky indoors or out.Smartphone Apps for AstronomySmartphones have become truly revolutionary devices in the 21stcentury. Though evolved from the hand-sized cell ormobile phone of the 1990s, today’s smartphones are really a powerful handheld computer that also incorporates atelephone and digital camera. The creation of small computer programs or applications—apps—have harnessed the powerof these devices in ways no one could have imagined twenty years ago.Over the past few years, many astronomy apps have been released for iOS (iPhone/iPod/iPad) and Android. The mostpopular type of astronomy app is the digital planetarium. Similar to the free softwareStellarium(which you used in Lab2) and commercial programs such asStarry NightandThe Sky, these apps will show you what stars, planets,constellations, and deep sky objects are visible at any time. They are scaled for phone-sized screens and can be zoomed asneeded. Further, these apps also work with your smartphone’s GPS to pinpoint objects in the correct part of the sky as youhold your smartphone up and move it around.Star Chart—the free app (for both iOS and Android) that we will be usinghas this ability. Additionally, some apps (Star WalkandSkySafari) also permit the user to activate the smartphone’scamera so you can see the actual sky with a translucent digital planetarium sky overlaid. (Star WalkandSkySafariare paidapps but are considered to be two of best available.)Other interesting astronomy apps include (these are ones I have downloaded for iOS):Jupiter Guide: shows the orientation of Jupiter and the 4 Galilean satellitesSaturn’s Moons: bySky & Telescope; similar to Jupiter GuidePlanet Wheel: shows the relative positions of planets at any time3D Sun: a NASA appRise and Set: For your location, gives the Sun’s rise/set times, civil/nautical/astronomical twilight timesLunaSolCal: gives rise/set times for Sun and Moon as well as you latitude and longitudeMoon+: Moon (free version)/Moon+ (paid version) gives you phase of the Moon and phase timelinePhases of the Moon: similar to Moon+SkyWeek (by Sky & Telescope): tells you what celestial events are happening each weekISS Spotter: tells you when the International Space Station will be visible in your area and where to lookfor itExoplanet: database of extra-solar planetsAll of these apps are available in free versions. (Most should have Android versions, but I have not verified this.)Getting Started withStar ChartGo to your app store and downloadStar Chartto your smartphone.