Any interest in astrology then you should definately read this .

World's top 10 largest planetary moons

1)jupiter/Ganymede.

In january 1610 this was discovered by galileo.Ganymede is thought to have a surface of ice about 97 km (60miles) thick. Launched in 1989, NASA 's Galielo probe reached Ganymede in june 1996.

2) Satrun/Titan

This is larger than mercury and pluto .No one have idea what its surface looks like becoz it has such a dense atmosphere but radio telescope observation suggests that it may have ethane ocean and continents of ice or other solid matter.

3)Jupiter/callisto

This moon possesses a similar compositions to ganymede. Callisto is heavily pitted with crater perhaps more so than other body in solar system.

4)Io/jupiter .

This has a crust of solid  sulphur with massive volcanic eruption in progress hurling sulphorous material 300 km (186miles )into space.

5)Moon /earth

 Earth own satellite is a quarter of the size of earth.it is the fifth largest in the solar system and to date the only one to have been explored by humans.

6)Europa / jupiter

Though europa's ice covered surface is smooth and crater free it is covered with mysterious black lines aome of them 63km (40miles) wide and resembling canals.

7)Triton/neptune.

This is supposd to getting progressively closer to neptune and it is believed that in several million years the force of the planet's gravity may pull it apart.scattering it into a form like the ring of saturn.

8)Titania /uranus

Titania was discovered by william Herschel on january 11th 1787.it is uranus

Largest  moon it has snow ball like surface of ice .its size estimate was revised  by data from voyager 2

9) Rhea/ saturn

This was discovered by jean dominique cassini  in 1672.this is saturn's 2nd largest moon . Voyager 1 confirmed that its icy surface is pitted with crater one of them 225km(140miles) in diameter.

10) oberon /uranus .

This moon was discovered by Herschel at the time as titania and given the name of the fairy king husband of queen titania .Data from voyager 2 relegated oberon from 9th to 10 th place in this list.

Another interesting thing about Astrology:recent observation of Halley's comet.

Top 10 most recent observation of Halley'S comet

As we have heard halleys comets which are often seen from earth .this comet comes every 75years .check out the dates of their observation.

1)1986

In this year the japanese Suisei probe passed within 151,000 km (93,827 miles) of its 15 km(9miles) nucleus within a hydrogen cloud emitting 20-50 tonnes of water per sec.

2)1910

In this year prediction of disaster were published widely.many people believed that the world would come to an end.Mark Twain (american author) who has been born at the time of the 1835 appearance  and believed that his fate was linked to that of the comet ,died when it reappeared this year.

3)1835

This comet was widely observed but noticeably dimmer than 1759.

4) 1759

The comet 's first return  as predicted by halley and thus providing his calculation correct.so named as halley's comet.

5)1682

During this year , it was observed in africa and china and extensively in europe  where it was viewed from 5-19 september by Edmond halley ,who prredicted its return.

6)1607

This was seen extensively in china japan ,korea and europe by german astronomer Johannes kepler ,its position was accurately measured by amertur Weish astronomer thomas harriot.

7)1531

It was observed in china,japan,and korea, also in europeby peter appian (german geographer and astronomer who  noted that comet tail point away from sun.

8)1456

It was also seen in china ,japan and korean and also by turkish army that was threatening to invade europe.

9)1378

It was also seen in china japan and europe

10)1301

 It was seen in iceland parts of europe china japan and korea.