卡西尼最近的作品展示

夜猫子

Sidelong at Saturn
Released: April 17, 2006 (PIA 08158)

Cassini looks toward the Saturnian horizon as Dione and Janus glide past.

A few craters are visible on Dione (1,126 kilometers, 700 miles across). Janus (181 kilometers, 113 miles across) is slightly blurred due to its motion during the exposure.

The rings appear essentially edge-on in this view, as Cassini continues its recent activities close to the ringplane.

The image was taken with the Cassini spacecraft narrow-angle camera on March 10, 2006, using a filter sensitive to wavelengths of infrared light centered at 750 nanometers. The image was acquired at a distance of approximately 2.9 million kilometers (1.8 million miles) from Saturn. The image scale is 17 kilometers (11 miles) per pixel.

[ 本帖最后由 夜猫子 于 2006-4-22 11:56 PM 编辑 ]

夜猫子

Released: April 18, 2006 (PIA 08159)

The tilted crescent of Saturn displays lacy cloud bands here along with a bright equatorial region and threadlike ring shadows on the northern hemisphere.

Three moons are visible here: Mimas (397 kilometers, 247 miles across) at left and faint, is aligned with the ringplane; at right are Rhea (1,528 kilometers, 949 miles across, at top) and Tethys (1,071 kilometers, 665 miles across, below Rhea).

夜猫子

Viewing Saturn from the Plane
Released: April 19, 2006 (PIA 08160)

This view of the ringed planet shows its tilt relative to the plane of its orbit around the Sun. The planet tilts nearly 27 degrees relative to the ecliptic plane, giving rise to seasons in which the rings shadow each hemisphere in its respective winter.

Most of the planetary bodies in the Solar System orbit near the plane of the ecliptic, since they formed along with the Sun from a spinning disk of gas and dust.

The high phase angle – the Sun-Saturn-spacecraft viewing angle, which is 116 degrees here – brings out cloud structure quite nicely.

夜猫子

Released: April 20, 2006 (PIA 08161)

Three of Saturn’s moons are captured with the planet in this exquisite family portrait. At top, Saturn is bedecked with the shadows of its innermost rings.

Tethys (1,071 kilometers, 665 miles across) appears at lower right, closest to Cassini; Janus (181 kilometers, 113 miles across) and Mimas (397 kilometers, 247 miles across) are on the far side of the immense ringed planet. Mimas is just about to slip behind Saturn.

夜猫子

Released: April 21, 2006 (PIA 08148)

Rhea shows off her bright, fresh-looking impact crater in this Cassini view taken during a close approach. For a high-resolution view of this crater, taken during a much closer encounter, see PIA07764.

The view is toward the leading hemisphere on Rhea (1,528 kilometers, 949 miles across). North is up.

林中燕语

看着不象木头，就象石头啊

林中燕语

不过还是很不错了，beautiful

bbh

我有一架站在地球上就能拍出这样效果的望远镜就好了