This video from Veritasium discusses the expansion of the Universe, the Hubble sphere, and the possibility of an infinite Universe.
“An incremental game with a science theme.” Similar to Cookie Clicker.
“A tediously accurate scale model of the solar system.”
Spend hours scrolling and scrolling and scrolling and scrolling and enjoy the vast emptiness of space. Put it on lightspeed mode and sit back and watch near-nothingness pass by for 5-and-a-half hours until you reach Pluto from the Sun.
“Scale of the Universe” is an interactive flash applet which lets you zoom in and out over several orders of magnitude in distance. Along the way, you’ll see things like atoms, dust mites, planets, and the edge of the observable universe. This is a really cool way to get some perspective as to just how huge, and how tiny, things can get.