The Hubble Space Telescope was a long and complex project. Here's a breakdown of the timeline:

* Conception: The idea for a space telescope was first proposed in the 1940s, but serious planning began in the 1970s.

* Development & Construction: The actual construction of the telescope began in 1977, and continued for over a decade.

* Launch: The Hubble Space Telescope was finally launched into orbit on April 24, 1990, by the Space Shuttle Discovery.

So, while the initial concept was much earlier, the total construction time was approximately 13 years.

However, it's important to note that the timeline includes a lot of research, design, testing, and delays. The actual physical construction of the telescope itself likely took a shorter period.