Identify the two oldest dwarfs in the universe

Mukremin Kilic and his colleagues identified two of the oldest and closest known white dwarfs ever known from the University of Oklahoma assistant professor of physics and astronomy. so far.

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Named as WD 0346 + 246 and SDSS J110217, 48 + 411315.4 (J1102) , these two stars are in turn in the constellations of Taurus (Taurus) and Great Hero (Ursa Major).

Astronomers identified the above white dwarfs formed 11 to 12 billion years ago and only 100 light-years from Earth.

They are examples of the oldest and closest stars in the universe formed after the Big Bang.

Kilic said that a white dwarf resembles a hot stove. Once the stove is off, it will cool down over time. By determining how far the oven has cooled, we can tell how long it has been turned off.

The two stars we identified have cooled for billions of years.

Mr. Kilic explained that the white dwarf is the burned core of the sun-like stars.

In about 5 billion years, the Sun will also be burned and turned into a white dwarf.

It will lose the outer layers during the destruction process and turn into an incredibly dense star with the size of Earth.

Kilic and his colleagues obtained infrared photographs using NASA's Spitzer space telescope to measure stars' temperatures.

Also, in the three-year period, they measured the distance of J1102 by tracking the star's motion using a 2.4-meter MDM Observatory telescope near Tucson, Arizona.