(1) If you were in a spaceship and you passed through the Earth's umbra you would not be able to see any part of the Sun.

(2) The penumbra is the transition from the photosphere to the umbra .

(3) The Moon can then pass through a part of the umbra (region of total shadow) and then there is a partial eclipse.

(4) How much the moon is dimmed depends on whether it passed through the penumbra or the darkest part of the shadow, the umbra .

(5) Also, because the Earth has an atmosphere, the Moon never really disappears from view, since some light is scattered and bent by the atmosphere and still reaches the Moon's surface, even when it is in the umbra , or total shadow.

(6) The strongest solar magnetic fields, up to 4000 gauss, are found within the umbra .

(7) Reacting, the Viking threw up his shield, disappearing into an umbra of flame.

(8) Each sunspot consists of a dark central umbra , which is estimated to have a temperature in the region of 4000u00d4u00f6u00bcu00d4u00fbu00e6C, and a surrounding penumbra, at a temperature in the region 5000u00d4u00f6u00bcu00d4u00fbu00e6C.

(9) Long, thin filaments radiate from the umbra into a brighter surrounding region called the penumbra.

(10) The darkest, central region of a sunspot, called the umbra , features tightly bundled magnetic field lines.

(11) Not once did she ask if he knew where they were going; and now, with a nettle laced gully yawning out past any shadowed umbra before them, that suddenly appeared very naive.

(12) The umbra is a central cone of darkness which tapers away from the Earth or Moon.

(13) While it is entirely within the umbra the lunar disk brightness drops to about one part in 5,000 that of the near-full moon, and so it can still be seen.

(14) For an observer standing between the Moon and the umbra cone summit the eclipse is total.

(15) Outlined against the setting sun, the silhouette took on a strangely surreal beauty, as if a shadow's penumbra and umbra were fused together.

(16) When the Moon is fully immersed in the umbra a total lunar eclipse occurs.

(17) If the Moon completely enters the umbra , a total lunar eclipse occurs.

(18) And by the time all of the moon is inside the umbra , at 5: 14 am, it will have changed colour, looking dim and amber to copper.

(19) A penumbral eclipse, sometimes called an appulse, occurs when the Moon misses the Earth's umbra but passes through its penumbra or secondary shadow.

(20) During the partial stage the increasing penumbral penetration is not noticeable on a minute-to-minute basis, but as the umbra approaches things start to happen fast.