  This paper summarizes some recent results in the low-frequency radio physics
of the Sun. The spatial domain covers the space from the outer corona to the
orbit of Earth. The results obtained make use of radio dynamic spectra and
white-light coronagraph images and involve radio bursts associated with solar
eruptions and those occurring outside solar eruptions. In particular, the
connection between type II radio bursts and the sustained gamma-ray emission
from the Sun is highlighted. The directivity of interplanetary type IV bursts
found recently is discussed to understand the physical reason behind it. A new
event showing the diffuse interplanetary radio emission (DIRE) is introduced
and its properties are compared with those of regular type II bursts. The DIRE
is from the flanks of a CME-driven shock propagating through nearby streamer.
Finally, a new noise storm observed by two spacecraft is briefly discussed to
highlight its evolution over two solar rotations including the disruption and
recovery by solar eruptions.
