STELLAR and planetary nurseries are private places.

恒星和行星产生的诞生地是很隐秘的位置。

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Astronomy focuses on the planetary. galactic. and stellar phenomena occurring in outer space.

天文学专业主要研究星星和星系以及外层空间中恒星的现象。

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Shining with light from the central star reflected by dust, the frigid Boomerang Nebula is believed to be a star or stellar system evolving toward the planetary nebula phase.

冰寒的回飞棒星云会发光，是因为它尘埃反射了来自中心星的星光，天文学家认为它是正在演化到行星状星云阶段的恒星或恒星系统。

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If whales do use stellar and planetary positions, it begs the question of how they keep track of those positions.

FORBES: Do Whales Use the Stars to Navigate?

Besides requiring astronomers to dream up a new mnemonic for their stellar classification, the existence of a grey area between stars and planets reveals the extent to which the processes of planetary and stellar formation are still a mystery.

ECONOMIST: Twinkle, twinkle, giant planet