NASA astronomers measure universe`s expansion
Washington: NASA astronomers were able to make the most precise measurement yet of the Hubble constant, or the rate at which our universe is stretching apart.
The Hubble constant is named after astronomer Edwin P. Hubble who astonished the world in the 1920s by confirming our universe has been expanding since it exploded 13.7 billion years ago. Astronomers used the Spitzer space telescope to measure the constant.
The newly refined value for the Hubble constant is 74.32.1 km per second per megaparsec. A megaparsec is roughly 3 million light years, Xinhua reported Wednesday.
In the late 1990s, astronomers discovered the expansion is accelerating, or speeding up over time. Determining the expansion rate is critical for understanding the age and size of the universe.
Unlike NASA`s Hubble space telescope, which views the cosmos in visible light, Spitzer took advantage of long-wavelength infrared light to make its new measurement.
More from India
More from World
More from Sports
More from Entertaiment
- Exclusive: Chat with 'Jazbaa' stars Aishwarya Rai and Irrfan Khan!
- Delhi government to add environment tax in electricity bill
- Shaheed Express train's freight coach catches fire on Ludhiana railway station
- AAP govt suggests four-fold hike in MLAs salaries
- DNA: Indian Army's 'Phantom Guns’ to defend border with Pakistan
- India vs South Africa 2015: 3rd T20I - Preview
- Modi govt turns down IAF's request for more foreign fighter planes, pushes for Made-in-India Tejas
- Indrani Mukerjea back in jail; claims did not take pills, was upset because of mother's death
- Unbelievable! Crops destroyed for Congress vice president Rahul Gandhi's rally in Karnataka
- Navjot Singh Sidhu diagnosed with DVT: Know about this life threatening disease!