how long have we been sending people into space? Or.. when did space exploration start?

You have to define "space"? What altitude?

http://www.seasky.org/spacexp/sky5d.html

Thanks.. um I just need to know how long we have been spending money on space explorations.

about 21 years

http://www.aerospaceguide.net/worldspace/canada.html

Space exploration began with the launch of the first artificial satellite, Sputnik 1, by the Soviet Union on October 4, 1957. This marked the beginning of the Space Age and the first step in sending people into space.

To find the exact duration of human space exploration, we need to calculate the time between the first human spaceflight and the present day. The first human to journey into space was Yuri Gagarin, a Soviet cosmonaut, who orbited the Earth on April 12, 1961.

To calculate the time since then, we can take the current year and subtract 1961:

Current year - 1961 = Total duration of human space exploration

For example, if the current year is 2023:

2023 - 1961 = 62 years

Therefore, as of 2023, we have been sending people into space for approximately 62 years.