NASA's Swift Observatory Ends Its Science Mission
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
NASA ended the science work of Swift.
- A2
NASA ended the science work of its Swift space telescope.
- B1
NASA, the US space agency, has ended the science mission of its Neil Gehrels Swift Observatory.
- B2
NASA's Neil Gehrels Swift Observatory has ended its science mission.
- C1
NASA's Neil Gehrels Swift Observatory has ended its science mission after its orbit dropped below 171 miles, or 275 kilometers, above Earth.
- C2
For nearly 22 years, NASA's Neil Gehrels Swift Observatory made a career out of pivoting toward the universe's most energetic explosions before their light could vanish.
Key words
Words from the B1 text, with their meaning.
- orbit
- the curved path that a spacecraft or planet follows as it goes around Earth or another object in space
- steadily
- in a firm, regular way without shaking or moving suddenly
- observation
- the act of watching something carefully, especially in science
- detect
- to notice or discover something that is difficult to see or hear
- evidence
- facts or signs that help show that something is true
- dense
- having a lot of matter packed closely together in a small space
Rewritten with AI from facts reported by NASA. Read the original for the full report.