মহাশূন্যে অবস্থিত বস্তুসমূহকেই জ্যোতিষ্ক যা Astronomical Bodies বা স্বর্গীয় বস্তু বা Heavenly Bodies বলা হয়ে থাকে। জ্যোতির্বিজ্ঞান মহাবিশ্বে ভ্রাম্যমাণ জ্যোতিষ্ক বিষয়ক বিজ্ঞান। পৃথিবী ছাড়া অন্য সব বস্তুই এর অন্তর্ভুক্ত। অন্যদিকে পৃথিবীসহ মহাবিশ্বের যাবতীয় বস্তুকে খ-বস্তু বা জ্যোতির্বৈজ্ঞানিক বস্তু বা Astronomical Objects বলা হয় ।
আমাদের অল-ইন-ওয়ান মোবাইল অ্যাপের মাধ্যমে সীমাহীন শেখার সুযোগ উপভোগ করুন।
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