When Earth and Mars are at their theoretically closest point of 54.6 million km, it would take a signal from Earth about 3 minutes to make the journey, and then another 3 minutes for the signals to get back to Earth.
Switchgrass is a hardy, deep-rooted, perennial rhizomatous grass that begins growth in late spring. It can grow up to 2.7 m high, but is typically shorter than big bluestem grass or indiangrass. The leaves are 30â90 cm long, with a prominent midrib.
Eelgrass is a common name for a group or genus of plants called Zostera that grow under water in estuaries and in shallow coastal areas. Eelgrass may also be referred to as SAV, or Submerged Aquatic Vegetation. Eelgrass is neither a grass nor a seaweed.elgrass is a common name for a group or genus of plants called Zostera that grow under water in estuaries and in shallow coastal areas. Eelgrass may also be referred to as SAV, or S ubmerged A quatic V egetation.