Term | Definition |
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Penumbra | The region of partial illumination surrounding the darkest part of a shadow caused by an eclipse |
perigee | |
Photometry | A technique for measuring the brightness of celestial objects |
Planet | Spherical ball of material such as rock and/or gas that orbits a star. The Earth is a planet. |
Planetary nebula | An expanding shell of glowing gas expelled by a star late in its life. Our Sun will create a planetary nebula at the end of its life |
Power Supply DC AC |
ספק חשמל/כוח. * הטלסקופים הממונעים מגיעים ללא ספק חשמלי. ניתן לרכוש מתאם רלוונטי ומיוצב, דרך חנות הטלסקופים של מצפה הכוכבים ברקת.
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Proper motion | The apparent motion of a star across the sky (wihtout the star’s parallax), arising from the star’s velocity through space with respect to the Sun |