All of those objects were discovered by telescope, so it's safe to say that telescopes were used from day one for each.
Those objects were all discovered by telescopes, so the answer is from day one.
In 1635
The 3 outer planets in our solar system are Saturn, Uranus and Neptune.It used to be Uranus, Neptune and Pluto, but Pluto was degraded to a dwarf planet in 2006 and is no longer considered a planet.
Yes, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto used to be one.
Only Mercury, Venus, Earth, Mars, Jupiter, and Saturn. Uranus was discovered in 1781, Neptune in 1846, and Pluto n 1930.
because its orbit was highly eccentric and used to intercede the orbit of Neptune. that is why Pluto is no more a part of our solar system as it collided with Neptune and exploded.
In 1635
In 1635
In 1635
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto there you goo hun
The 3 outer planets in our solar system are Saturn, Uranus and Neptune.It used to be Uranus, Neptune and Pluto, but Pluto was degraded to a dwarf planet in 2006 and is no longer considered a planet.
yes, there used to be nine planets: mercury,venus,earth,mars,juptier,saturn,uranus,neptune,pluto.
Yes, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto used to be one.
telescopes
Only Mercury, Venus, Earth, Mars, Jupiter, and Saturn. Uranus was discovered in 1781, Neptune in 1846, and Pluto n 1930.
That used to be Pluto, but now it's Neptune.
because its orbit was highly eccentric and used to intercede the orbit of Neptune. that is why Pluto is no more a part of our solar system as it collided with Neptune and exploded.
Telescopes, spectroscopy, and a "Voyager" space probe.