Reber had just one little problem. To explore the radio energy, he needed a radio telescope – a telescope that could detect invi
sible radio energy – but there was no such thing at the time. So he invented one. —A Black Hole Is NOT a Hole, Carolyn Cinami DeCristofano How does the information about Reber's invention connect to what you have learned about black holes? Black holes are also invisible. Black holes are seen in a telescope. Black holes were also invented. Black holes detect radio energy.
It would be yards because the action verb is sells, and in order to answer the question what, the direct object would have yards because the store is selling what? They're selling yards.
