Exploring the Night Sky
In the app: the whole story at your level, listening, the quiz and the word cards.
The same story at six levels
How the first sentence reads at every level, from A1 to C2.
- A1
Algol is a star system.
- A2
A NASA satellite shows the regular dimming of Algol.
- B1
The star Algol, which is located in the Perseus constellation, is also known as the Demon Star.
- B2
Located in the Perseus constellation, the star Algol is also known as the Demon Star.
- C1
Astronomers often associate certain celestial objects with Halloween themes due to their visual appearance or historical mythology.
- C2
Astronomers often associate certain celestial objects with Halloween themes due to their visual appearance or historical mythology.
Key words
Words from the B1 text, with their meaning.
- dimming
- the process of becoming less bright
- brightness
- the quality or state of giving out or reflecting light
- eclipse
- to block the light of one celestial body by passing in front of it
- illuminate
- to light something up
- faint
- not bright or clear; difficult to see
- aperture
- an opening, hole, or gap, especially in a camera or telescope
Rewritten with AI from facts reported by NASA. Read the original for the full report.