Explanation of the hadith
The dwellers of Paradise are of different ranks and levels based on their degrees of virtue. The dwellers of the highest ranks will be seen as the stars by those in the lower ranks.
The dwellers of Paradise will see the upper abodes of Paradise as you see the stars in the sky
Authentic hadithNarrated by Bukhari & MuslimHadeethEnc #8354
عن سهل بن سعد رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: «إن أهل الجنة لَيَتَراءَوْنَ الغُرَفَ في الجنة كما تَتَراءَوْنَ الكوكب في السماء».
English translation
Sahl ibn Sa‘d (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "The dwellers of Paradise will see the upper abodes of Paradise as you see the stars in the sky."
Descriptions of Paradise and Hell