Far more expensive and far less productive.
Telescopes, spectroscopes, space probes.
If by humans visiting you mean , Which planet's have had humans land on that planet the answer is none. The only other place in space that humans have visited is the moon.
by sending space probes to space like the mars rover helps us understand the climate, etc. so when we get there we know what were dealing with and where to land
Do you mean Radio Telescopes? A radio telescope is a form of directional radio antenna used in radio astronomy. The same types of antennas are also used in tracking and collecting data from satellites and space probes.
Telescopes, Space missions, probes all help scientists discover more about the moon.
By observing them regularly using telescopes and by sending orbital or lander probes to them.
NASA occasionally sends out space probes instead of humans because astronauts could not survive on some of the places that space probes are sent to.
yes
Robot space probes and telescopes
By using robot space probes and telescopes
they use space probes,satellites,and of coarse,telescopes.
Briefly, sending probes out (for example, to get near the Sun, some planet, some comet, or some asteroid, or just to take certain measurements, like measuring the solar wind, at different distances from Earth); looking at the Universe through Earth-based telescopes; sending telescopes into orbit (where they have a clearer picture, and can see wavelengths that don't pass through Earth's atmosphere); analyzing other particles that reach Earth, such as the cosmic rays, or neutrinos.Briefly, sending probes out (for example, to get near the Sun, some planet, some comet, or some asteroid, or just to take certain measurements, like measuring the solar wind, at different distances from Earth); looking at the Universe through Earth-based telescopes; sending telescopes into orbit (where they have a clearer picture, and can see wavelengths that don't pass through Earth's atmosphere); analyzing other particles that reach Earth, such as the cosmic rays, or neutrinos.Briefly, sending probes out (for example, to get near the Sun, some planet, some comet, or some asteroid, or just to take certain measurements, like measuring the solar wind, at different distances from Earth); looking at the Universe through Earth-based telescopes; sending telescopes into orbit (where they have a clearer picture, and can see wavelengths that don't pass through Earth's atmosphere); analyzing other particles that reach Earth, such as the cosmic rays, or neutrinos.Briefly, sending probes out (for example, to get near the Sun, some planet, some comet, or some asteroid, or just to take certain measurements, like measuring the solar wind, at different distances from Earth); looking at the Universe through Earth-based telescopes; sending telescopes into orbit (where they have a clearer picture, and can see wavelengths that don't pass through Earth's atmosphere); analyzing other particles that reach Earth, such as the cosmic rays, or neutrinos.
The space shuttle has carried into space hundreds of astronauts and satellites. It also ferried parts and crew to the International Space Station. Three interplanetary probes, and several orbital telescopes including Hubble Space Telescope.
Through telescopes. We have more ground based telescopes than we have instruments in space, though we have also learned a great deal through some space missions, such as through the COBE & WMAP satellites. Optical telescopes provide a wealth of information, but we can see further using radiotelescopes, and we can penetrate deeper through clouds of interstellar gas with infrared telescopes.
please help me answer it
We use space probes, and send astronauts... etc.
It has changed because we have better telescopes and rocket probes to find them.