Age of the universe

OverviewExplanationHistoryObservational limitsCosmological parametersWMAPPlanckAssumption of strong priors

The Lambda-CDM concordance model describes the evolution of the universe from a very uniform, hot, dense primordial state to its present state over a span of about 13.77 billion years of cosmological time. This model is well understood theoretically and strongly supported by recent high-precision astronomical observations such as WMAP. In contrast, theories of the origin of the primordial state

Stunning discovery: Farthest ever radio burst traveled 8 billion years

Scientists yield 789 kg oil, 891 MWh solar power per hectare yearly from same land. It was traced back to a galaxy so far away that its light had traveled for eight billion

Solar and wind to lead growth of U.S. power generation for the

As a result of new solar projects coming on line this year, we forecast that U.S. solar power generation will grow 75% from 163 billion kilowatthours (kWh) in 2023 to 286 billion

Solar System Facts

Our solar system includes the Sun, eight planets, five officially named dwarf planets, and hundreds of moons, and thousands of asteroids and comets. Our solar system is located in the Milky Way, a barred spiral galaxy with two major

The sun won''t die for 5 billion years, so why do humans have only

OverviewFormation and evolutionGeneral characteristicsSunInner Solar SystemOuter Solar SystemTrans-Neptunian regionMiscellaneous populations

The Solar System formed at least 4.568 billion years ago from the gravitational collapse of a region within a large molecular cloud. This initial cloud was likely several light-years across and probably birthed several stars. As is typical of molecular clouds, this one consisted mostly of hydrogen, with some helium, and small amounts of heavier elements fused by previous generations of stars.

Renewable Energy

This interactive chart shows the amount of energy generated from solar power each year. Solar generation at scale – compared to hydropower, for example – is a relatively modern renewable energy source but is growing quickly in many

Rooftop solar incentive to cost customers without solar an estimated $8

non-rooftop solar customers, are a contributing factor to high electricity rates. This cost burden – commonly referred to as a cost shift – to non-rooftop solar customers of Pacific Gas and

Exoplanet reveals the fate of Earth in 8 billion years

A rocky exoplanet located 4,000 light years away provides a possible preview of the Sun and Earth''s fate 8 billion of years from now. humanity might find refuge in the outer solar system. Several moons of Jupiter

Stunning Video Shows How Much Earth Has Changed in 1.8 Billion Years

This first attempt at mapping the last 1.8 billion years of Earth''s history is a leap forward in the scientific grand challenge to map our world. But it is just that – a first attempt.

Solar power in Germany – output, business & perspectives

Despite the country''s modest potential for harvesting solar energy the Renewable Energy Act (), introduced in the year 2000 allowed for a rapid growth of Germany''s solar power capacity.The

The sun won''t die for 5 billion years, so why do

For a star the size of ours, this phase lasts a little over 8 billion years. Our solar system is just over 4.5 billion years old, so the sun is slightly more than halfway through its stable lifetime.

Our Sun: Facts

Our Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. which accounts for 99.8% of our solar system''s mass. Much of the remaining material formed the planets and

The history of solar energy

Take a look at the brief history of the key events that led to solar power becoming the success that it is today. 1839 - First solar cell is created While experimenting with metal electrodes and an acidic solution, nineteen-year-old French

Solar Energy

We will have a steady, limitless supply of sunlight for another five billion years. In one hour, Earth''s atmosphere receives enough sunlight to power the electricity needs of every human being on Earth for a year. Solar energy is

A Decade of Growth in Solar and Wind Power: Trends

Box 2. Solar Power in the National Electricity Mix. Utility-scale solar accounts for around 8% of the nation''s capacity from all utility-scale electricity sources (including renewables, nuclear

5.2: Measuring Ages

So, for a star with twice the mass of the Sun, its lifetime would be one-quarter that of the Sun, or ¼ × 10 billion years = 2.5 billion years. Questions: 1. Use the relation for stellar lifetimes to estimate the lifetime of a star with ½ the mass of

Ask Ethan: How Sure Are We That The Universe Is 13.8 Billion Years

When the calculations were fully worked out, we realized that the Sun''s lifetime would be something more like 10–12 billion years, and that we were about 4.5 billion years into