In Bava Batra 73a it says:
"אָמַר רַבָּה אִשְׁתַּעוּ לִי נָחוֹתֵי יַמָּא בֵּין גַּלָּא לְגַלָּא תְּלָת מְאָה פַּרְסֵי וְרוּמָא דְגַלָּא תְּלָת מְאָה פַּרְסֵי זִימְנָא חֲדָא הֲוָה אָזְלִינַן בְּאוֹרְחָא וְדַלִּינַן גַּלָּא עַד דַּחֲזֵינַן בֵּי מַרְבַּעְתֵּיהּ דְּכוֹכְבָא זוּטָא וְהַוְיָא לִי כְּמִבְזַר אַרְבְּעִין גְּרִיוֵי בִּזְרָא דְחַרְדְּלָא וְאִי דַּלִּינַן טְפֵי הֲוָה מִקְּלֵינַן מֵהַבְלֵיהּ
Said Rabbah: Seafarers told me that between each wave there are 300 parasangs and the height of each wave is 100 parasangs. One time we travelled on a ship and a wave lifted us so high that we saw the dwelling place of a small star, and to me it seemed that the size of the star was like the size of an area necessary for the planting of 40 se'ah of mustard seeds. And if we had gone up any higher, we would have been scorched by the heat of the star."
Why was Rabbah afraid of getting scorched by the star? Did he chas v'shalom forget the pasuk in Bamidbar 24:17:
"דרך כוכב מיעקב"
"Tread a star will [a man] from Jacob"
which means that people from Am Yisrael are able to walk on stars (and some of them might even be living on them)! So why was Rabbah worried?