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अंतरिक्ष खोजी अभियानों के लिहाज से भी अन्य ग्रहों-उपग्रहों और तारों की तुलना में टाइटन को उपयुक्त उपग्रह माना जाता रहा है। पृथ्वी से बाहर जीवन की मौजूदगी की जिज्ञासा में वैज्ञानिक लंबे समय से टाइटन की ओर टकटकी लगाए बैठे हैं। इसी क्रम में हाल ही में अमेरिकी अंतरिक्ष एजेंसी नासा ने टाइटन पर जीवन की संभावनाओं की जांच-पड़ताल के लिए ड्रैगनफ्लाई नामक रोबोटिक क्वाडकॉप्टर यानी हेलीकॉप्टर ड्रोन भेजने की योजना बनाई है। इस ड्रोन को 2026 में भेजा जाना है और 2034 में इसके टाइटन पर पहुंचने की संभावना है। तकरीबन 85 करोड़ डॉलर के इस मिशन के अंतर्गत ड्रोन प्रोपेलर का इस्तेमाल करते हुए टाइटन की सतह से नमूने एकत्रित कर उसकी संरचना समझने की कोशिश होगी। प्रोपेलर ऐसे यंत्र को कहा जाता है, जो किसी भी यान को आगे धकेलने में सहायता करता है।
ड्रैगनफ्लाई ने तकरीबन एक दर्जन प्रस्तावित परियोजनाओं में अन्य यानों से बेहतर प्रदर्शन किया है। यह जटिल कार्बनिक अणुओं की पहचान करने में सक्षम उपकरणों से लैस किसी कार जैसा ही होगा। यह नासा के न्यू फ्रंटियर्स कार्यक्रम के एक हिस्से के रूप में वित्त पोषित किया जाने वाला चौथा मिशन है, जो मध्यम आकार के ग्रहों की परियोजनाओं से संबंधित है। इसी कार्यक्रम के तहत न्यू होराइजंस अंतरिक्ष यान को प्लूटो पर भेजा गया था। न्यू फ्रंटियर्स कार्यक्रम के तहत ही बृहस्पति पर जूनो मिशन तथा बेनू क्षुद्रग्रह पर ओसिरिस-रेक्स मिशन भेजे जा चुके हैं।
नासा के कैसिनी मिशन के दौरान ऐसे संकेत मिले थे कि टाइटन पर कुछ ऐसे कार्बनिक पदार्थ उपस्थित हैं, जिन्हें जीवन के लिए जरूरी माना जाता है। यहां तक तरल जल की मौजूदगी का भी दावा किया गया था। ड्रैगनफ्लाई टाइटन के भूमध्य रेखा के पास ठोस हाइड्रोकार्बन स्नोफ्लेक्स से बने टीलों के बीच उतरेगा। यह रोबोटिक ड्रोन छोटी-छोटी उड़ानें भरेगा और विभिन्न स्थानों पर उतर कर वहां के नमूने एकत्र करेगा। इसकी लंबी उड़ान आठ किलोमीटर तक की होगी। यह यान करीब 175 किलोमीटर की उड़ान भरेगा। यह दूरी मंगल पर अभी तक भेजे गए समस्त रोवरों द्वारा मिलकर तय की गई दूरी से दोगुनी अधिक होगी। नासा के एक अधिकारी थॉमस जुबरुशेन का कहना है कि टाइटन सौरमंडल में सबसे अनोखा है और उसकी पड़ताल के लिए प्रस्तावित ड्रैगनफ्लाई मिशन भी अपने आप में अनोखा है। जरा एक ऐसे हेलीकॉप्टर की कल्पना कीजिए जो टाइटन के कार्बनिक रेतीले टीलों पर मीलों तक उड़ता रहेगा।
टाइटन हमारी पृथ्वी के चंद्रमा से बहुत बड़ा है और बृहस्पति के चंद्रमा गनीमिड के बाद सौरमंडल का दूसरा सबसे बड़ा उपग्रह है। मजे की बात यह है कि इसका आकार बुध ग्रह से भी बड़ा है। टाइटन को खोजने का श्रेय डच खगोल वैज्ञानिक क्रिस्टीयान हुयजेंस को दिया जाता है। टाइटन की सबसे बड़ी विशेषता है उसका सघन एवं विस्तृत वायुमंडल।
पृथ्वी की तरह ही टाइटन का वायुमंडल नाइट्रोजन से बना है। इसकी सतह का वायुदाब पृथ्वी से 45 गुना अधिक है। वहां मिथेन के बादल हैं और मिथेन की बारिश होती है। वायुमंडल में दूसरे कार्बनिक रसायन भी बनते हैं जो हल्की बर्फ की तरह नीचे गिरते रहते हैं। बहरहाल, कई देशों के वैज्ञानिक उत्साह से टाइटन के रहस्यों को जानने में प्रयासरत हैं। आशा है कि ड्रैगनफ्लाई टाइटन के अपारदर्शी वायुमंडल को भेदकर उसके अनेकानेक रहस्यों से पर्दा उठाएगा।
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