Saturn’s moon Mimas - level 3

Saturn’s moon Mimas - level 3

24-10-2014 15:00

A new study focusing on the inside of Saturn's icy moon Mimas suggests that its cratered surfaces hide one of two intriguing possibilities: either the moon's frozen core is shaped a bit like a rugby ball, or it contains a liquid water ocean.

Researchers used a number of images of Mimas taken by NASA's Cassini Mission to determine how much the moon wobbles, as it orbits Saturn.

They later came to the conclusion that the data suggests that something "isn't right".

An underground ocean is one of two explanations for why the 400-mile diameter moon wobbles.

The other possibility is that Mimas has an oblong or rugby ball-shaped core.

Whilst scientists believe the ocean idea sounds quite unlikely, a closer look at the moon's eccentric orbit suggests gravitational tugging by Saturn as the moon circles closer and then further away could cause enough frictional heating to melt ice and form an ocean.

Difficult words: intriguing (interesting), liquid water ocean (oceans made of water are rare on other planets and moons), determine (find out), wobble (move a little from side to side), oblong (a circle where one side is longer than the other), eccentric (strange), tug (pull).


What do you think about this?

How to improve your English with News in Levels:



  1. Read all today's articles and translate all words which you don't understand.
  2. Read the articles from the day before and see if you remember all new words.


  1. Listen to all today's news.
  2. Stop the video after every sentence and repeat the sentence.
  3. Repeat point 2 for the news which you listened to the day before.


  1. Answer the questions under today's news and write them into the comments.
  2. Chat in the  Chat room for at least 2 minutes. You can write about today's news.


  1. Choose one person from the SKYPE section.
  2. You can talk about today’s news or you can answer questions from
If you want to know how to learn English effectively, please visit

1) Watch this video about News in Levels

2) Practice your English every day for free!

We will send you articles from News in Levels every day to your email. You can stop them at any time.