Identify all the sentences in passive voice in the given passage and change them into active
voice:
Of all the planets in the solar system other than the Earth, five can be seen by the naked eye.
Those planets have been known to astronomers for thousands of years. Uranus was
discovered in 1781. Then , in 1846, John Couch Adams discovered Neptune. Pluto was
discovered in 1930. The name Pluto was chosen by Venetia Burney, an 11-year old British
school girl. Pluto is smaller in size than all other planets, in fact it is smaller than the Earth’s
moon. So, it is no longer considered a proper planet. Pluto’s planetary status was taken away
in 2006 by the International Astronomical Union. More recently it has been conjectured that
Pluto originated somewhere outside the solar system and got caught in the Sun’s gravity
Answers
Answer:
Pluto, once considered the ninth and most distant planet from the sun, is now the largest known dwarf planet in the solar system. It is also one of the largest known members of the Kuiper Belt, a shadowy zone beyond the orbit of Neptune thought to be populated by hundreds of thousands of rocky, icy bodies each larger than 62 miles (100 kilometers) across, along with 1 trillion or more comets.
In 2006, Pluto was reclassified as a dwarf planet, a change widely thought of as a demotion. The question of Pluto's planet status has attracted controversy and stirred debate in the scientific community, and among the general public, since then. In 2017, a science group (including members of the New Horizon mission) proposed a new definition of planethood based on "round objects in space smaller than stars," which would make the number of planets in our solar system expand from 8 to roughly 100.
American astronomer Percival Lowell first caught hints of Pluto's existence in 1905 from odd deviations he observed in the orbits of Neptune and Uranus, suggesting that another world's gravity was tugging at these two planets from beyond. Lowell predicted the mystery planet's location in 1915, but died without finding it. Pluto was finally discovered in 1930 by Clyde Tombaugh at the Lowell Observatory, based on predictions by Lowell and other astronomers.
Pluto got its name from 11-year-old Venetia Burney of Oxford, England, who suggested to her grandfather that the new world get its name from the Roman god of the underworld. Her grandfather then passed the name on to Lowell Observatory. The name also honors Percival Lowell, whose initials are the first two letters of Pluto.
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