One of 42 new <a href="https://en.wikipedia.org/wiki/proplyds" class="extiw" title="en:proplyds">proplyds</a> discovered in the <a href="https://en.wikipedia.org/wiki/Orion_Nebula" class="extiw" title="en:Orion Nebula">Orion Nebula</a>, 205-421 is one of the bright proplyds that lies relatively close to the nebula’s brightest star, <a href="https://en.wikipedia.org/wiki/Theta%C2%B9_Orionis_C" class="extiw" title="en:Theta¹ Orionis C">Theta¹ Orionis C</a>. The tadpole-shaped tail is actually a jet of matter flowing away from the excited cusp.
NASA/ESA and L. Ricci (ESO)
CC BY 4.0
<a rel="nofollow" class="external free" href="http://www.spacetelescope.org/images/heic0917av/">http://www.spacetelescope.org/images/heic0917av/</a>