NASA is tracking an asteroid moving past Earth bigger than any building on our planet.
The Asteroid, named 7482 (1994 PC1), is expected to soar past Earth on January 18 and is believed to measure 3,551 feet wide.
Experts believe the asteroid will shoot past our planet around 1.2million miles away.
NASA said: "Near-Earth #asteroid 1994 PC1 (~1 km wide) is very well known and has been studied for decades by our #PlanetaryDefense experts.
"Rest assured, 1994 PC1 will safely fly past our planet 1.2 million miles away next Tues., Jan. 18."
Nasa's Center for Near Earth Object Studies (CNEOS) said on its website: "Potentially Hazardous Asteroids (PHAs) are currently defined based on parameters that measure the asteroid’s potential to make threatening close approaches to the Earth."
Nasa is currently looking into defence methods against any asteroids with potential to stray too close to earth and recently launched its Double Asteroid Redirection Test (DART) mission.
Nasa said : "DART is the first-ever mission dedicated to investigating and demonstrating one method of asteroid deflection by changing an asteroid’s motion in space through kinetic impact."
Earlier this week, a massive asteroid wider than Big Ben passed Earth.
The rock, dubbed Asteroid 2013 YD48 by NASA, came within 3.48million miles of our planet as it soared through space.
The asteroid measured a massive 104-metres wide making it wider than famous Westminster landmark Big Ben is tall.
Despite its impressive size, it was slightly too small to be considered a potentially hazardous object - a name given to space junk discovered by the space agency that could prove a threat.
