Not just Earth, whole universe sees rise in temperature.

 According to a new study, Earth is not the only planet which is getting hotter, but the entire universe has been observing a spike in temperature.

The study by the Ohio State University Center for Cosmology and Astroparticle Physics shows that the "universe is getting hotter". The big revelation came amid the scientists' restless examinations on the thermal history of the universe over the last 10 billion years.

According to the report, the study shows that the "mean temperature of gases across the universe has increased more than 10 times throughout the last 10 billion years". They have observed that the temperature has reached around 2 million degrees Kelvin today, which is roughly 4 million degrees Fahrenheit.

Yi-Kuan Chiang of The Ohio State University Center for Cosmology and Astroparticle Physics, who is the lead author of the study, said the new measurement provides a straight confirmation of the influential work by Jim Peebles, the 2019 Nobel Physics winner. Peebles laid out the theory of how the large-scale structure forms in the universe.

The study also explained how, with the evolution of the universe, gravity pulls dark matter and gas in space together into galaxies and clusters of galaxies. The pull is so violent that more and more gas is shocked and heated up. Scientist used a new method to measure the temperature of gas farther away from Earth. The scientists, during the research, then compared those measurements to gases closer to Earth and near the present time.

They said the "universe is getting hotter over time due to the gravitational collapse of cosmic structure, and the heating will likely continue". Data from the Planck and the Sloan Digital Sky Survey was used to observe how the universe's temperature has gone up.

The universe is warming because of the natural process of galaxy and structure formation, Chiang said, adding that the process is unrelated to the global warming happening on Earth. He said that the two phenomena are happening on very different scales and are not at all connected.