Wl

la Condamiiie

The edge of Sinus Iridum resembles a "golden handle" at this time. 2002.12.14 16:40 UT Age 10 days. C9 + Of 25 + CP990 @ 1,r4sec, DSCN5B32

la Condamiiie

The edge of Sinus Iridum resembles a "golden handle" at this time. 2002.12.14 16:40 UT Age 10 days. C9 + Of 25 + CP990 @ 1,r4sec, DSCN5B32

Sinus Iridum 2002.12.16 14:02UT Age 12 days. 10-in tf6 Royce mirror +2.5X+ToUcam, 2 frames stacked.

Sinus Iridum (Bay of Rainbows) 31.50 W 44.10 N

Sinus Iridum is a distinct landmark on the north-western edge of Mare Imbrium (Sea of Rains). It measures 230 km between two capes named Promontorium Laplace (height 2600 m) and Promontorium Heraclides (height 1700 m). Its origin is believed a vast crater but large part of the walls is overwhelmed by Mare Imbrium. Under low Sun angle, the floor of Sinus Iridum is crossed by wrinkle ridges, and Montes Jura (the semicircular mountain range along the shore) resembles a "golden handle" of a teapot. In the 17th century, the western cape of Sinus Iridum was nicknamed the "Moon Maiden" by the French astronomer Cassini.

The Moon Maiden When the Italian-born French astronomer Cassini observed Sinus iridum in the I7'h century, he depicted Promontorium Heraclides (circled) as the "Moon Maiden", complete with face and waving hair, Cassini's "Moon Maiden" is in fact an illusion and may not show up all the time. The trick to knowing it is to view it on a night when seeing is rot that good; this exaggerates the illusion !

The Moon Maiden When the Italian-born French astronomer Cassini observed Sinus iridum in the I7'h century, he depicted Promontorium Heraclides (circled) as the "Moon Maiden", complete with face and waving hair, Cassini's "Moon Maiden" is in fact an illusion and may not show up all the time. The trick to knowing it is to view it on a night when seeing is rot that good; this exaggerates the illusion !

Bianchini 34.30 W 48.70 N Sharp 40.20 W 45.70 N

Crater Bianchini (38 km) and Sharp (39 km) resemble a pair of "eyes" guarding Sinus Iridum.

Maupertuis 27.30 W 49.60 N A pentagon-shaped disintegrated crater close to Promontorium Laplace, 45 km across. A small lava "lake" is just in the south.

Montes Recti 20.00 W 48.00 N A straight range of mountains close to Sinus Iridum, 20 x 90 km and up to 1800 m high. A small crater lies near the eastern and western end of this range respectively.

Image T065, next page :

2006.05.09 15:03 UT Age 12 days. 10-in ff6 Newtonian + 4X + ToUcam [80% resized)

Lambert 21.00 W 25.80 N

A crater with terraced walls, 30 km in diameter. Its immediate south is the ghost crater

Lambert R (55 km). See also Image T177 in Map 19

C. Herschel 31.20 W 34.50 N

A 13-km crater named after Caroline Herschel, the sister of the German-born English astronomer William Herschel who discovered Uranus in 1781. She assisted her brother lifetime and was the first woman to discover a comet.

Mons La Hire 25.50 W 27.80 N

An isolated mountain, base about 11 x 25 km, peak height 1500 m. It is a highland remnant partially submerged in lava. A closer view from the Apollo-15 mission is given in [Map 1

Dorsum Zirkel 23.50 W 28.10N Dorsum Heim 29.80 W 32.00 N They are wrinkle ridges on the western side of Mare Imbrium. Dorsum Zirkel is 190 km long. Dorsum Heim is nearly 150 km long, followed by few more unnamed wrinkle ridges that extend northwards into Sinus Iridum.

Sunrise over Sinus Iridum

Lambert

Mons La Hire

Caventou

Del isle

McDonald

Prom. Heraciides

Prom. Heraciides

Domes near Prom. Heraciides 2004.05.29 15:19UT Age 1G days I

Domes near Prom. Heraciides 2004.05.29 15:19UT Age 1G days I

Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

Get My Free Ebook


Post a comment