Strange Matter is a state of matter which is formed near the core of a neutron star under immense pressure and heat. Even one atom of strange matter can turn a planet into a planet of strange matter.

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The common reason for astronauts’ death😵

Typically, they died of cardiovascular diseases.

It turned out that 48.65% died of this cause, and 27.03% died of malignant neoplasms. In addition, more than 16% of deaths were due to accidents, and one case was due to an unknown cause.

The average age of astronaut deaths was 64.4 years.

Heart problems led to the death of about half of the astronauts.
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What are the 3 arrows of time?

Hawking identified three distinct “arrows of time”: a psychological arrow (underpinning our memories of the past and how we imagine the future), a thermodynamic arrow (the direction in which entropy increases), and a cosmological arrow (the direction in which the size of the universe increases).

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1. Cosmological arrow of time

The cosmological arrow of time is easily described: the universe is expanding. This expansion indicates the direction of a bigger universe. As the universe expands, it also leads to an increase in entropy, reflecting the tendency of systems to move from more ordered to less ordered states. These two arrows of time, the expansion of the universe and the increase of entropy, are interconnected. If the universe were to contract and reverse its expansion, some cosmologists speculate that the other arrows of time would also reverse.

📌These cosmological arrows of time are fundamental to our understanding of the universe's history and the nature of time.

To be continued....
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2. Psychological arrow of time

The psychological arrow of time is the subjective perception of time experienced by individuals, characterized by a clear distinction between the past, present, and future. It is intimately connected to our consciousness and reflects the sequential nature of events and formation of memories.

📌This psychological time corresponds to the human perception of time, where memories reside in the past and our awareness of progressing through time is marked by an accumulation of remembered experiences.

To be continued......
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3. Thermodynamics Arrows of Time

The thermodynamic arrow of time is governed by the second law of thermodynamics, stating that in an isolated system, entropy tends to increase over time.

Thermodynamic arrows guide reaction direction: → signifies the forward reaction releasing energy, ← represents the reverse reaction requiring energy input. A double-headed arrow (⇌) indicates a reversible reaction achieving equilibrium.

📌In summary, the arrow of time and thermodynamic arrows capture the captivating flow of time and the dynamic nature of chemical reactions.

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What are the classification of stars?

Stars are classified into groups based on the temperature, stars of type O are the hottest and type M.
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