Një yll

Një yll

Star with spectral type A in which the spectrum of the Balmer lines of hydrogen attain their greatest strength. Helium lines can no longer be seen. Some metallic lines are present; in late A stars the H and K lines of ionized calcium appear. A0 stars have a color index of zero.

0 0

Cải thiện

Thêm hình ảnh

Loại từ: noun
Từ đồng nghĩa:
Blossary:
Ngành nghề/Lĩnh vực: Astronomy
Category: General astronomy
Company: Caltech
Sản phẩm:
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