Is the universe younger or older than expected? The universe is a little younger than expected: it is 12.5 billion years-old, about a billion less than previously thought. The new estimate comes from calculations based on the movement of 50 galaxies.
Published in the Astronomical Journal, the result is due to physicists led by James Schombert, of the University of Oregon. So far the methods used to calculate the age of the universe have been based on the Hubble constant, which estimates the rate of expansion of the universe, and on the observations of the echo of the Big Bang, that is, the cosmic background radiation.
However, Schombert notes, these methods reach different conclusions. James Schombert said: "The problem of the scale of distances, as you know, is incredibly difficult because the distances from the galaxies are enormous and the indications for their distances are weak and difficult to calibrate."
The team overcame the problem by accurately measuring the distances of 50 galaxies thanks to data from the NASA Spitzer space telescope. These measurements were then used as a reference for measuring the distances of 95 other galaxies.
The universe, Schombert observes, is governed by a series of mathematical schemes expressed in equations. The new approach, the expert notes, explains more accurately the movements of the galaxies and transforms these data into equations which are then used to calculate the age of the universe.
Spaceshiptwo: the spacecraft will take tourists to space
Virgin Galactic has unveiled the interior of its Spaceshiptwo, the spacecraft will take tourists to space. Tailored seats and suits, 17 portholes from which to look outwards and cameras everywhere to capture a unique experience: this is what the cabin of the Spaceship Two will look like, the Virgin Galactic spacecraft for private travel.
Spaceshiptwo was presented by the company of Richard Branson, British tycoon and founder of the Virgin Group. The trip is for tourists and scientists, the requests are already many but the price will be accessible to very few: more than 250 thousand dollars per ticket.
The aircraft is designed to make suborbital journeys and, according to the first rumors, the trip should last almost three hours in total, even if the actual stay in Space will be only a few minutes. Meanwhile in addition to the ark of seeds in the Svalbard islands, which preserves over a million samples, the bank of open source software on which our digital civilization is based has been opened.
Bitcoin, Linux, computer languages such as Rubin and Python are kept under various meters of permafrost, always in Svalbard. Microfilm was chosen as a support, capable according to the creators of surviving the cold for a thousand years.
In 186 reels, the GitHub developer platform now owned by Microsoft, has placed humanity's software in a safe surrounded by steel walls in an old coal mine, 250 meters deep, next to the ark of seeds and biodiversity. In all, 21 terabytes of data were transported to the bank. Its name is Arctic World Archive and it will be updated every time an important new program is added.