42 years on, Voyager 2 charts interstellar space

  • Tuesday 05, November 2019 08:18 AM
  • 42 years on, Voyager 2 charts interstellar space
Sharjah24 - A probe launched by NASA four days after Elvis died has delivered a treasure trove of data from beyond the "solar bubble" that envelops Earth and our neighbouring planets, scientists reported Monday.
But for every mystery Voyager 2 has solved about the solar winds, magnetic fields and cosmic rays that buffet the boundary between interstellar space and the Sun's sphere of influence, a new one has cropped up.

Voyager 2 left Earth's orbit in 1977 a month before its twin Voyager 1, but took seven years longer to reach the heliosphere's outer limit some 18 billion kilometres (more than 11 billion miles) away.

Shaped something like a windsock in a stiff breeze, the heliosphere is formed by the Sun's magnetic field and solar winds that can reach speeds of three million kilometres per hour.