light echoes
...that light echoes appear to exceed the speed of light due to simple interstellar illusions?
...that <b id="mwBko"><a href="./Light_echo" id="mwBks" rel="mw:WikiLink" title="Light echo">light echoes</a></b> appear to exceed the <a href="./Speed_of_light" id="mwBkw" rel="mw:WikiLink" title="Speed of light">speed of light</a> due to simple <a class="mw-disambig" href="./Interstellar" id="mwBk0" rel="mw:WikiLink" title="Interstellar">interstellar</a> <a class="mw-redirect" href="./Illusions" id="mwBk4" rel="mw:WikiLink" title="Illusions">illusions</a>?