The alignment of the sun, moon, and earth are the reason why lunar eclipses are considered inauspicious. This is because the alignment of the sun, moon, and earth have an impact on gravity. A celestial phenomenon occurs because of many reasons, like the sun rays that are blocked or the moon rays that are more prominent.
Both of these occurrences conceal the light from a luminary in the sky. The light doesn't have the ability to reach the Earth, which leads to a dramatic occurrence. This will lead to all those that are dependent on light, will be deprived of it while the eclipse is going on.
It is considered to be inauspicious because the alignment of the moon, earth, and sun affect gravity. Whether it's the sun's rays that are being blocked and the moon rays are more prominent, it is a celestial phenomenon that is happening. During both of these scenarios, the light from a massive luminary in the sky is temporarily concealed.
The light of these two objects is prevented from reaching the earth, and to that end, something very dramatic is occurring. The apparent impact is that all life forms, which are dependent on this light, are suddenly deprived of it throughout the time of the eclipse.