What is necessary in order for astronauts to survive long trips into space? technologies that permit astronauts to see better

technologies that make time go faster

technologies that make it easier to study hunger

technologies that counteract the effects of weightlessness

Which of the following do astronomers detect directly when they use telescopes to study stars and galaxies?

atoms

energy

mass

heat

Which of the following is NOT a discovery made with the aid of a telescope?

evidence that planets orbit the sun

craters on the moon

the moons of Jupiter

life on other planets

How could an astronomer completely eliminate the distortion of light caused by Earth's atmosphere to get the best telescope images?

put the telescope at a very high altitude

use lenses rather than mirrors to gather light

use an array of telescopes to concentrate the image

locate the telescope in space

The Greek mathematician Ptolemy created an ancient model of the universe in which the was at the center.

Sun

Milky Way

Earth

Moon

Telescopes magnify which of the following?

sound

motion

light

heat

What evidence did Galileo observe that supported Copernicus's idea of a heliocentric model?

naked-eye observations of Jupiter moving around a fixed center

naked-eye observations and mathematics of the sun moving around Earth

telescopic views of the sun moving around Earth

telescopic views of planets moving around a fixed center

The clearest image of the planet Neptune would be obtained using:

a pair of binoculars.

a telescope on Earth.

a telescope in space.

a spectroscope.

To determine what a star is made of, an astronomer uses:

an optical telescope.

a radio telescope.

a spectrograph.

an astrolabe.

Why are new technologies necessary for future space exploration?

Astronauts will spend long periods in spacecraft and we need to know how this will affect their bodies.

New technologies will permit astronauts to eat fewer meals.

Current technologies don't allow astronauts to sleep very well in space.

Space travel is very expensive and we will need to know the costs ahead of time.

How could an astronomer completely eliminate the distortion of light caused by Earth's atmosphere to get the best telescope images?

put the telescope at a very high altitude

use lenses rather than mirrors to gather light

use an array of telescopes to concentrate the image

locate the telescope in space

Which of the following is NOT a discovery made with the aid of a telescope?

evidence that planets orbit the sun

craters on the moon

the moons of Jupiter

life on other planets