  I review several ongoing connections between space physics and astrophysics:
a) Measurements of energetic particle spectra have confirmed theoretical
prediction of the highest energy to which shocks can accelerate particles, and
this has direct bearing on the origin of the highest energy cosmic rays. b)
Mass ejection in solar flares may help us understand photon ejection in the
giant flares of magnetar outbursts. c) Measurements of electron heat fluxes in
the solar wind can help us understand whether heat flux in tenuous
astrophysical plasma is in accordance with the classical Spitzer-Harm formula
or whether it is reduced well below this value by plasma instabilities.
