Editing Solar flare (section)

=== Space telescopes ===
{{Unreferenced section|date=June 2024}}
[[File:SDO EVE Late Phase Flares.webm|thumb|Observations of a solar flare by different instruments aboard the [[Solar Dynamics Observatory]]]]
Because the Earth's atmosphere [[Absorption (electromagnetic radiation)|absorb]]s much of the electromagnetic radiation emitted by the Sun with wavelengths shorter than 300&nbsp;nm, space-based telescopes allowed for the observation of solar flares in previously unobserved high-energy spectral lines. Since the 1970s, the GOES series of satellites have been continuously observing the Sun in soft X-rays, and their observations have become the standard measure of flares, diminishing the importance of the H-alpha classification. Additionally, space-based telescopes allow for the observation of extremely long wavelengths—as long as a few kilometres—which cannot propagate through the ionosphere.